Table Of Content

CANADIAN JOURNAL REVUE CANADIENNE OF BOTANY DE BOTANIQUE Volume 70, 1992 Contents /Sommaire JANUARY / JANVIER ARTICLES Halvor Solheim The early stages of fungal invasion in Norway spruce infested by the bark beetle Ips typographus K. D. Bennett Holocene history of forest trees on the Bruce Peninsula, southern Ontario Jian-Guo Gao and Annette Nassuth Cytological changes induced by wheat streak mosaic virus in cereal leaf tissues Kathryn M. Jacobson and Orson K. Miller, Jr. Physiological variation between tree-associated populations of Suillus granulatus as determined by in vitro mycorrhizal synthesis experiments Monique Beuve and Hervé Lapierre Resistance to RPV barley yellow dwarf virus in the genus Bromus George J. Wilder Comparative morphology and anatomy of absorbing roots and anchoring roots in three species of Cyclanthaceae (Monocotyledoneae) X. S. Ye, U. Jarifors, S. Tuzun, S. Q. Pan, and J. Kuc Biochemical changes in cell walls and cellular responses of tobacco leaves related to systemic resistance to blue mold (Peronospora tabacina) induced by tobacco mosaic virus Jeffrey G. Duckett and Roberto Ligrone A light and electron microscope study of the fungal endophytes in the sporophyte and gametophyte of Lycopodium cernuum with observations on the gametophyte —sporophyte junction Gisela Cuenca and Milagros Lovera Vesicular—arbuscular mycorrhizae in disturbed and revegetated sites from La Gran Sabana, Venezuela W. W. Mitchell Cytogeographic races of Arctagrostis latifolia (Poaceae) in Alaska Koji Iwase Gluconic acid synthesis by the ectomycorrhizal fungus Tricholoma robustum Stefan Andersson Phenotypic selection in a population of Crepis tectorum ssp. pumila (Asteraceae) A. J. Kuthubutheen, G. M. Liew, and A. Nawawi Nawawia nitida anam. sp.nov. (Hyphomycetes) and further records of Nawawia filiformis from Malaysia A. J. Kuthubutheen and A. Nawawi_ New litter-inhabiting hyphomycetes from Malaysia: Isthmophragmospora verruculosa, lyengarina asym- metrica, and lyengarina furcata Branka Stevanovic, Pham Thi Anh Thu, Fernando Monteiro de Paula, and Jorge Vieira da Silva Effects of dehydration and rehydration on the polar lipid and fatty acid composition of Ramonda species Michael J. R. Mould and Jane Robb The Colletotrichum trifolii — Medicago sativa interface, in culture: a cytological analysis H. B. Massicotte, J. M. Trappe, R. L. Peterson, and L. H. Melville Studies on Cenococcum geophilum. I. Sclerotium morphology, germination, and formation in pure culture and growth pouches R. E. Redmann and M. Q. Qi_ Impacts of seeding depth on emergence and seedling structure in eight perennial grasses Thomas Sawidis and George Heinrich Cesium-137 monitoring using lichens and mosses from northern Greece Charles E. Umbanhowar, Jr. Early patterns of revegetation of artificial earthen mounds in a northern mixed prairie S. G. Mansfield and L. G. Briarty Cotyledon cell development in Arabidopsis thaliana during reserve deposition Masahiro Kato and Ryoko Imaichi Leaf anatomy of tropical fern rheophytes, with its evolutionary and ecological implications Luc C. Duchesne and Pierre J. Charest Effect of promoter sequence on transient expression of the 8-glucuronidase gene in embryogenic calli of Larix Xeurolepis and Picea mariana following microprojection Christian Godbout and J. André Fortin Effects of nitrogen fertilization and photoperiod on basidiome formation of Laccaria bicolor associated with container-grown jack pine seedlings A. R. Biggs and G. R. Alm Response of peach bark tissues to inoculation with epiphytic fungi alone and in combination with Leucostoma cincta Victor C. Runeckles and Manivalde Vaartnou Observations on the in situ detection of free radicals in leaves using electron paramagnetic resonance spectrometry Andrea L. Corbett, Pam G. Krannitz, and Lonnie W. Aarssen The influence of petals on reproductive success in the arctic poppy (Papaver radicatum) Jefferson G. Lebkuecher and William G. Eickmeier Photoinhibition of photophosphorylation, adenosine triphosphate content, and glyceraldehyde-3-phosphate dehydrogenase (NADP* ) following high-irradiance desiccation of Selaginella lepidophylla W. Greenaway, S. English, and F. R. Whatley Relationships of Populus <acuminata and Populus x generosa with their parental species examined by gas chromatography — mass spectrometry of bud exudates NOTES J. Chong, Z. Kang, W. K. Kim, and R. Rohringer Multinucleate condition of Puccinia striiformis in colonies isolated from infected wheat leaves with macerating enzymes C-1 C-2 CAN. J. BOTANY VOL. 70, 1992 Kazuhiro Toyoda, Tomonori Shiraishi, Issei Kobayashi, Naoto Yamaoka, and Hitoshi Kunoh Treatment of a single plant cell with chemicals Instructions to authors Recommandations aux auteurs FEBRUARY/FEVRIER ARTICLES David J. Rawlence Paleophycology and Long Lake, Saint John County, New Brunswick, Canada, based on diatom distribution in sediments J. M. Leggett, G. Ladizinsky, P. Hagberg, and M. Obanni The distribution of nine Avena species in Spain and Morocco Warren H. Wagner, Jr., Florence S. Wagner, Anton A. Reznicek, and Charles R. Werth Dryostichum singulare (Dryopteridaceae), a new fern nothogenus from Ontario F. Jailloux Jn vitro production of the teleomorph of Guignardia bidwellii, causal agent of black rot of grapevine Claudia Erbar Floral development of two species of Stylidium (Stylidiaceae) and some remarks on the systematic position of the family Stylidiaceae M. Nilsson, E. Baath, and B. Séderstrém The microfungal communities of a mixed mire in northern Sweden Charles E. Umbanhowar, Jr. Abundance, vegetation, and environment of four patch types in a northern mixed prairie Jeannette Whitton and John F. Bain An analysis of morphological variation in Senecio cymbalaria (Asteraceae) K. A. Richardson, R. L. Peterson, and R. S. Currah Seed reserves and early symbiotic protocorm development of Platanthera hyperborea (Orchidaceae) Jacob Garty The postfire recovery of rock-inhabiting algae, microfungi, and lichens Henriette Giese Replication of DNA during barley endosperm development G. A. Wheeler, E. J. Cushing, E. Gorham, T. Morley, and G. B. Ownbey A major floristic boundary in Minnesota: an analysis of 280 taxa occurring in the western and southern portions of the state T. J. Gulya, T. P. Freeman, and D. E. Mayhew Ultrastructure of virus-like particles in Plasmopara halstedii Christopher H. Briand, Usher Posluszny, and Douglas W. Larson Differential axis architecture in Thuja occidentalis (eastern white cedar) I. Waters and J. M. Shay Effect of water depth on population parameters of a Typha glauca stand Anil Grover and Deepak Pental _Interrelationships of Oryza species on electrophoretic patterns of alcohol dehydrogenase James A. Kolmer Effect of sexual recombination in two populations of the wheat leaf rust fungus Puccinia recondita Suzanne S. Sanxter, Harry Y. Yamamoto, David G. Fisher, and Harvey T. Chan, Jr. Development and decline of chloroplasts in exocarp of Carica papaya Ernst von Rudloff and Martin S. Lapp Chemosystematic studies in the genus Pinus. VII. The leaf oil terpene composition of ponderosa pine, Pinus ponderosa T. T. Chang and W. H. Ko Inheritance of isozyme production and sexual reproduction in Phytophthora infestans T. R. Seastedt, W. J. Parton, and D. S. Ojima_ Mass loss and nitrogen dynamics of decaying litter of grasslands: the apparent low nitrogen immobilization potential of root detritus A. J. M. Van der Sman, C. W. P. M. Blom, and H. M. Van de Steeg Phenology and seed production in Chenopodium rubrum, Rumex maritimus, and Rumex palustris as related to photoperiod in river forelands E. W. A. Boehm, J. C. Wenstrom, D. J. McLaughlin, L. J. Szabo, A. P. Roelfs, and W. R. Bushnell An ultrastructural pachytene karyotype for Puccinia graminis f.sp. tritici E. Horak and O. K. Miller, Jr. Phaeogalera and Galerina in arctic-subarctic Alaska (U.S.A.) and the Yukon Territory (Canada) NOTES Christopher H. Briand, Usher Posluszny, and Douglas W. Larson Comparative seed morphology of Thuja occidentalis (eastern white cedar) from upland and lowland sites Hironori Koga, Takao Tsukiboshi, and Tsutomu Uematsu Application of an osmium-maceration technique to observe plant—microbe interfaces of Italian ryegrass and crown rust fungi by scanning electron microscopy COMMENTAIRE/COMMENTARY Claude Richard, Ginette Fortier et Bernard Boullard L’usage de |’article devant le binéme latin désignant les espéces du monde vivant MARCH/ MARS ARTICLES Donald M. Britton and Daniel F. Brunton Isoetes xjeffreyi, hyb.nov., a new Isoetes (Isoetes macrospora x Isoetes riparia) from Quebec, Canada CONTENTS/SOMMAIRE Ian D. Reid Demethylation of the lignin model dimer 1-(3',4'-dimethoxyphenyl)-2-(o-methoxyphenoxy)-prop,a3n-dei-o l by the white-rot fungus Phlebia tremellosa Edward C. Yeung and Sandra K. Law Embryology of Calypso bulbosa. Il. Embryo development George W. Argus The phytogeography of rare vascular plants in Ontario and its bearing on plant conservation Hilary R. Skilnyk and John N. A. Lott Mineral analyses of storage reserves of Cucurbita maxima and Cucurbita andreana pollen Bernard R. Baum and L. Grant Bailey Morphometric study of three closely related South American species of Hordeum section Stenostachys (Poaceae) Gijs J. H. van Rooijen, Ronald W. Wilen, Larry A. Holbrook, and Maurice M. Moloney Regulation of accumulation of mRNAs encoding a 20-kDa oil-body protein in microspore-derived embryos of Brassica napus J. E. Staub, L. D. Knerr, D. J. Holder, and B. May Phylogenetic relationships among several African Cucumis species Ping Chen and John N. A. Lott Studies of Capsicum annuum seeds: structure, storage reserves, and mineral nutrients Dennis E. Desjardin, George J. Wong, and Don E. Hemmes Agaricales of the Hawaiian Islands. I. Marasmioid fungi: new species, new distributional records, and poorly known taxa Hugh Tyson Relationships, derived from optimum alignments, among amino acid sequences of plant peroxidases L. Shain and J. B. Miller Movement of cytoplasmic hypovirulence agents in chestnut blight cankers Marguerite Kane and Paul B. Cavers Patterns of seed weight distribution and germination with time in a weedy biotype of proso millet (Panicum miliaceum) Clinton F. Hodges Vegetative growth and sporulation of Bipolaris sorokiniana on infected leaves of Poa pratensis exposed to postemergence herbicides Richard Cété, Jean M. Gerrath, Usher Posluszny, and Bernard Grodzinski Comparative leaf development of conventional and semi- leafless peas (Pisum sativum) J. Nielsen Ustilago spp. pathogenic on Aegilops. Ill. Ustilago phrygica, with a descriptive key to all three Ustilago spp. on Aegilops Jerry M. Baskin and Carol C. Baskin Role of temperature and light in the germination ecology of buried seeds of weedy species of disturbed forests. I. Lobelia inflata Sylvia Kelso Conspectus of the genus Douglasia (Primulaceae) with comments on Douglasia alaskana, an Alaska— Yukon alpine endemic David Racusen and Richard Racusen Esterase activity and structural heterogeneity in patatin from a wild potato species K. Hasebe, S. Murakami, and A. Tsuneda Cytology and genetics of a dikaryotic strain of Lentinus edodes carrying two haplolethal factors Suzanne Aldington and Stephen C. Fry Plant cell wall-lysing enzymes in the apoplast of tomato leaves infected with Fulvia fulva George H. La Roi Classification and ordination of southern boreal forests from the Hondo — Slave Lake area of central Alberta Kerry O’Donnell Ultrastructure of meiosis and the spindle pole body cycle in freeze-substituted basidia of the smut fungi Ustilago maydis and Ustilago avenae John Bissett Trichoderma atroviride Raymond Louis Tremblay Trends in the pollination ecology of the Orchidaceae: evolution and systematics NOTES Tomohiro Kiyosue, Shinobu Satoh, Hiroshi Kamada, and Hiroshi Harada Immunological detection of an embryogenic-cell protein (ECP31) during stress-induced somatic embryogenesis in carrot Paul G. Harrison and Cynthia Durance Variation in clonal structure in an eelgrass (Zostera marina) meadow on the Pacific coast of Canada APRIL/ AVRIL Canadian Botanical Association symposium on the role of structure and development in evolution A symposium sponsored by the Canadian Botanical Association L’ Association botanique du Canada symposium : |’évolution et importance de la structure et du développement Un symposium supporté par |’Association botanique du Canada Usher Posluszny and Jean M. Gerrath Introduction 659 R. L. Peterson Adaptations of root structure in relation to biotic and abiotic factors 661 Nancy G. Dengler Patterns of leaf development in anisophyllous shoots Shirley C. Tucker The role of floral development in studies of legume evolution V. K. Sawhney Floral mutants in tomato: development, physiology, and evolutionary implications Rolf Sattler Process morphology: structural dynamics in development and evolution ARTICLES J. J. Pasternak and B. R. Glick Molecular evolutionary analyses of the small and large subunits of ribulose-1,5-bisphosphate carboxylase/ oxygenase C-4 CAN. J. BOTANY VOL. 70, 1992 G. Hausner, G. G. Eyjélfsdéttir, J. Reid, and G. R. Klassen Two additional species of the genus Togninia J. Buffard-Morel, J.-L. Verdeil et C. Pannetier Embryogenése somatique du cocotier (Cocos nucifera L.) a partir d’explants foliaires : histologique E. E. Mclver Fossil Fokienia (Cupressaceae) from the Paleocene of Alberta, Canada Martha J. Powell and Sonali Roychoudhury Ultrastructural organization of Rhizophlyctis harderi zoospores and redefinition of the type | microbody — lipid globule complex Sonali Roychoudhury and Martha J. Powell Precise flagellar configuration of the Rhizophlyctis harderi zoospore E. R. Littley and J. E. Rahe Sclerotial morphogenesis in Sclerotium cepivorum in vitro Michéle C. Heath, Richard J. Howard, Barbara Valent, and Forrest G. Chumley Ultrastructural interactions of one strain of Magnaporthe grisea with goosegrass and weeping lovegrass Alfredo D. Martinez-Espinoza, Karla J. Dugan, Michael E. Bjarko, and John E. Sherwood Improved media for testing the mating reaction and genetic complementation of Ustilago hordei Robert K. Antibus, Robert L. Sinsabaugh, and Arthur E. Linkins Phosphatase activities and phosphorus uptake from inositol phosphate by ectomycorrhizal fungi K. Fuchs and K. P. Pauls Flow cytometric characterization of microspore development in Brassica napus Stephen B. Goodwin, Robert W. Allard, Shirlee A. Hardy, and Robert K. Webster Hierarchical structure of pathogenic variation among Rhynchosporium secalis populations in Idaho and Oregon Elizabeth John Distribution patterns and interthalline interactions of epiphytic foliose lichens S. Greipsson and A. A. Crowder Amelioration of copper and nickel toxicity by iron plaque on roots of rice (Oryza sativa) S. J. Read, S. T. Moss, and E. B. G. Jones Germination and development of attachment structures by conidia of aquatic Hyphomycetes light microscope studies S. J. Read, S. T. Moss, and E. B. G. Jones Germination and development of attachment structures by conidia of aquatic Hyphomycetes: a scanning electron microscope study M. A. McLean and J. C. Sutton Mycoflora of strawberry in Ontario Gregor Langen, Bernd Beis#mann, Hans J. Reisener, and Kalle Kogel A §-1,3-p-endo-mannanase from culture filtrates of the hyyppeer - parasites Verticillium lecanii and Aphanocladium album that specifically lyses the germ pore plug from uredospores of Puccinia graminis f.sp. tritici C. Kerfourn and J. P. Garrec Modifications in the alkane composition of cuticular waxes from spruce needles (Picea abies) and ivy leaves (Hedera helix) exposed to ozone fumigation and acid fog: comparison with needles from declining spruce trees H. F. G. Van Dijk, M. Van der Gaag, P. J. M. Perik, and J. G. M. Roelofs Nutrieat availability in Corsican pine stands in The Netherlands and the occurrence of Sphaeropsis sapinea: a field study Douja Ben Miled-Daoud et Abdelkader Cherif Effet du NaC! sur lutilisation des lipides et les activités enzymatiques glyoxysomales au cours de la germination de deux espéces de Medicago May/ Mal INVITED ARTICLE MARCH 1992 / ARTICLE SOLLICITE MARS 1992 Gijs J. H. van Rooijen, Ronald W. Wilen, Larry A. Holbrook, and Maurice M. Moloney Regulation of accumulation of mRNAs encoding a 20-kDa oil-body protein in microspore-derived embryos of Brassica napus INVITED REVIEW / SYNTHESE SOLLICITEE Héléne Sanfagon Regulation of mRNA formation in plants: lessons from the cauliflower mosaic virus transcription signals ARTICLES Kevin B. Jensen, S. L. Hatch, and J. K. Wipff Cytology and morphology of Pseudoroegneria deweyi (Poaceae: Triticeae): a new species from the foot hills of the Caucasus Mountains (Russia) L. Waterkeyn, A. Bienfait et T. Monniez Les cystides a cristaux des Inocybes (Agaricales) : étude histochimique et cristallographique Larry Hufford Leaf structure of Besseya and Synthyris (Scrophulariaceae) E. Garnier-Sillam, I. Grech, Y. Czaninski, M.-T. Tollier et B. Monties Etude cytochimique ultrastructurale de la dégradation des lignines dans les résidus pariétaux de bois d’épicéa et de peuplier par le Reticulitermes lucifugus var. santonensis (Rhinotermitidae, Isoptera) Dan O. Chellemi and James J. Marois Population dynamics of the plant pathogenic fungus Uncinula necator G. Ouzounidou, E. P. Eleftheriou, and S. Karataglis Ecophysical and ultrastructural effects of copper in Thlaspi ochroleucum (Cruciferae) Jon Lovett Doust The influence of plant density on flower, fruit, and leaf demography in bush bean, Phaseolus vulgaris Darleen A. DeMason, Daniel Widney, and James I. Stillman /n vitro and transplantation experiments with germination of date embryos Marie Claude G. Trudel and J. K. Morton Pollen morphology and taxonomy in North American Labiatae Perla Hamon, Jean-Paul Brizard, Jeanne Zoundjihékpon, Christophe Duperray et Alain Borgel Etude des index d’ADN de huit espéces d’ignames (Dioscorea sp.) par cytométrie en flux CONTENTS/SOMMAIRE Suzanne Bertrand, Nicole Benhamou, Paul Nadeau, Daniel Dostaler, and André Gosselin Immunogold localization of free abscisic acid in tomato root cells S. N. Acharya, C. B. Chu, R. Hermesh, and G. B. Schaalje Factors affecting red-osier dogwood seed germination James L. Kerwin, Lisa M. Johnson, Howard C. Whisler, and Amy R. Tuininga Infection and morphogenesis of Pythium marinum in species of Porphyra and other red algae C. P. Chanway and F. B. Holl Influence of soil biota on Douglas-fir (Pseudotsuga menziesii) seedling growth: the role of rhizosphere bacteria D. A. Neher, H. T. Wilkinson, and C. K. Augspurger Progression of damping-off epidemics in Glycine populations of even-age and mixed-age structure Barbara F. Palser, John L. Rouse, and Elizabeth G. Williams A scanning electron microscope study of the pollen tube pathway in pistils of Rhododendron D. W. T. Au, I. J. Hodgkiss, and L. L. P. Vrijmoed Decomposition of Bauhinia purpurea leaf litter in a polluted and unpolluted Hong Kong waterway D. W. T. Au, I. J. Hodgkiss, and L. L. P. Vrijmoed Fungi and cellulolytic activity associated with decomposition of Bauhinia purpurea leaf litter in a polluted and unpolluted Hong Kong waterway Jean-Daniel Viémont et Francois Beaujard Les bruyéres in vitro. IX. Edification du systeme racinaire adventif chez l’Erica xdarleyensis; mise en évidence d’une rythmicité Ahmed Fathi Oueida et Marie-Odile Desbiez Influence de la qualité de |’éclairement sur les corrélations entre le cotylédon et son bourgeon axillaire chez le Linum usitatissimum NOTES Dan O. Chellemi and Kerry O. Britton Influence of canopy microclimate on incidence and severity of dogwood anthracnose Paulette Tai Chun and Leslie G. Hickok Inheritance of two mutations conferring glyphosate tolerance in the fern Ceratopteris richardii JUNE/ JUIN ARTICLES Leonardo Galetto and Luis M. Bernardello Extrafloral nectaries that attract ants in Bromeliaceae: structure and nectar composition Denis Barabé, Luc Brouillet et Charles Bertrand Organogénie de la feuille du Begonia radicans Vellozo et du Begonia scabrida (Begoniaceae) X. Y. Wang, C. G. Suhayda, and R. E. Redmann_ Identification of physiological ecotypes in Hordeum jubatum based on responses to salinity stress J. P. O’Donnell and R. B. van Huystee Peanut peroxidase and the anionic component Jorge Dubcovsky and Arturo J. Martinez Cytotaxonomy of the Festuca spp. from Patagonia Kimberley A. Ottenbreit and Richard J. Staniforth Life cycle and age structure of ramets in an expanding population of Salix exigua (sandbar willow) W. R. Remphrey and C. G. Davidson Branch architecture and its relation to shoot-tip abortion in mature Fraxinus pennsylvanica Alan Whittick Culture, cytology, and reproductive biology of Callithamnion corymbosum (Rhodophyceae, Ceramiaceae) from a western New- foundland fjord Mireille Desponts and Serge Payette Recent dynamics of jack pine at its northern distribution limit in northern Quebec J. A. Hoes and E. O. Kenaschuk Host—pathogen specificity in postseedling reaction of Linum usitatissimum to Melampsora lini Ravindra G. Bhat, Arthur F. Olah, and August F. Schmitthenner Characterization of universally avirulent strains of Phytophthora sojae R. Gill and Praveen K. Saxena Direct somatic embryogenesis and regeneration of plants from seedling explants of peanut (Arachis hypogaea): promotive role of thidiazuron Robert W. Lichtwardt and Marvin C. Williams Smittium bullatum from a New Zealand midge larva and new records of other trichomycete gut fungi Robert W. Lichtwardt and Marvin C. Williams Furculomyces, a new homothallic genus of Harpellales (Trichomycetes) from Australian midge larvae J. Postma and H. Rattink Biological control of Fusarium wilt of carnation with a nonpathogenic isolate of Fusarium oxysporum M. Menasherov, N. Paster, and R. Nitzan Effects of physical preservation methods on sclerotial germination in Aspergillus flavus and Aspergillus ochraceus in stored grain T. R. Gordon and D. Okamoto Variation within and between populations of Fusarium oxysporum based on vegetative compatibility and mitochondrial DNA Marcelo A. Aizen and Hilary Woodcock Latitudinal trends in acorn size in eastern North American species of Quercus M. T. Misset Meiotic abnormalities during microsporogenesis and low fertility in prostrate ecotypes of Ulex species (Papilionoideae, Genisteae) James P. Braselton Ultrastructural karyology of Spongospora subterranea (Plasmodiophoromycetes) Koji Iwase Induction of basidiospore germination by gluconic acid in the ectomycorrhizal fungus Tricholoma robustum C-4 CAN. J. BOTANY VOL. 70, 1992 E. B. Hariri, B. Jeune, S. Baudino, K. Urech et G. Sallé Elaboration d'un coefficient de résistance au gui chez le chéne Ivano Brunner, Franziska Brunner, and Gary A. Laursen Characterization and comparison of macrofungal communities in an Alnus tenuifolia and an Alnus crispa forest in Alaska Niels Daugbjerg and @jvind Moestrup Ultrastructure of Pyramimonas cyrtoptera sp.nov. (Prasinophyceae), a species with 16 flagella from northern Foxe Basin, Arctic Canada, including observations on growth rates H. O. Kojwang and B. J. van der Kamp Early symptoms and resistance of lodgepole pine seedlings inoculated with western gall rust J. W. Belcher, P. A. Keddy, and P. M. Catling Alvar vegetation in Canada: a multivariate description at two scales Ernest Small and Manal Fawzy Morphogeographic variation in the Medicago monantha complex Karima Mikou et Philippe Badila Induction photopériodique de |’organogenése et de la floraison in vitro chez le Cichorium intybus : aspects histologiques JULY / JUILLET ARTICLES Shuhei Fujii and Johan A. Hellebust Release of intracellular glycerol and pore formation in Dunaliella tertiolecta exposed to hypotonic stress Bohun B. Kinloch, Jr. Distribution and frequency of a gene for resistance to white pine blister rust in natural populations of sugar pine Jon K. Piper Size structure and seed yield over 4 years in an experimental Cassia marilandica (Leguminosae) population Shuhei Fujii and Johan A. Hellebust Effects of Ca?* on the growth of Dunaliella tertiolecta in media with high concentrations of Mg** T. J. Keenan and L. C. Cwynar Late Quaternary history of black spruce and grasslands in southwest Yukon Territory P. Bourgeais-Chaillou, F. Perez-Alfocea et G. Guerrier Evolution ontogénique de la tolérance au NaC! chez la soja : comparaison des réponses au sel & deux stades de développement et chez les cals correspondants Sandra C. Lindstrom and Kathleen M. Cole Relationships between some North Atlantic and North Pacific species of Porphyra (Bangiales, Rhodophyta): evidence from isozymes, morphology, and chromosomes Silvina Garralla and K. Gajewski Holocene vegetation history of the boreal forest near Chibougamau, central Quebec G. Hause, B. Hause, and A. A. M. Van Lammeren_ Microtubular and actin filament configurations during microspore and pollen development in Brassica napus cv. Topas S. Pasqualini, F. Panara, and M. Antonielli Acid phosphatase activity in Pinus pinea — Tuber albidum ectomycorrhizal association M. Jurzysta, S. Burda, W. Oleszek, M. Ploszynski, E. Small, and C. Nozzolillo Chemical composition of seed saponins as a guide to the classification of Medicago species George J. Wilder Orthodistichous phyllotaxy and dorsiventral symmetry on adult shoots of Cyclanthus bipartitus (Cyclanthaceae, Mono- cotyledoneae) P. Halama, A. Parguey-Leduc et L. Lacoste Les organes de reproduction de |’ascomycéte Phaeosphaeria (Leptosphaeria) nodorum et de sa forme asexuée Septoria nodorum C. Neal Stewart, Jr. and Erik T. Nilsen Drosera rotundifolia growth and nutrition in a natural population with special reference to the significance of insectivory Yougi Liu and Nancy G. Dengler Development of open and closed leaf sheaths in Festuca trachyphylla and Festuca rubra (Poaceae) Yousry A. El-Kassaby and Hugh J. Barclay Cost of reproduction in Douglas-fir Norbert Piitz Measurement of the pulling force of a single contractile root O. A. Awadalla and I. M. El-Refai Herbicide-induced resistance of cotton to Verticillium wilt disease and activation of host cells to produce the phytoalexin gossypol Henri Barthou Relations entre organogénése apicale et croissance dimensionnelle de la tige principale du soja (Glycine max) J. L. Julien and J. M. Frachisse Involvement of the proton pump and proton conductance change in the wave of depolarization induced by wounding in Bidens pilosa Zara Afzal-Rafii, Richard S. Dodd, and Yvonne Pelleau Mediterranean evergreen oak diversity: morphological and chemical variation of acorns Klaus B. Tenberge Ultrastructure and development of the outer epidermal wall of spruce (Picea abies) needles Peter Nosko and Kenneth A. Kershaw The influence of pH on the toxicity of a low concentration of aluminum to white spruce seedlings Daryl E. Enstone and Carol A. Peterson A rapid fluorescence technique to probe the permeability of the root apoplast Daryl E. Enstone and Carol A. Peterson The apoplastic permeability of root apices NOTE S. B. Narasimhulu, Shyam Prakash, V. L. Chopra, and V. Arunachalam Comparative shoot regeneration in diploid and amphidiploid Brassica species and their interspecific hybrids CONTENTS/SOMMAIRE AuGusT/AOUT ARTICLES D. M. Rizzo, R. A. Blanchette, and M. A. Palmer Biosorption of metal ions by Armillaria rhizomorphs B. A. D. Hetrick, G. W. T. Wilson, and T. C. Todd Relationships of mycorrhizal symbiosis, rooting strategy, and phenology among tallgrass prairie forbs Antony N. G. Holden and Paul G. Mahlberg Application of chemotaxonomy of leafy spurges (Euphorbia spp.) in biological control Kerstin Huss-Danell, Per-Olof Lundquist, and Helene Ohlsson _N, fixation in a young Alnus incana stand, based on seasonal and diurnal variation in whole plant nitrogenase activity Kerstin Huss-Danell and Helene Ohlsson Distribution of biomass and nitrogen among plant parts and soil nitrogen in a young Alnus incana stand L. V. Gusta, B. Ewan, M. J. T. Reaney, and S. R. Abrams The effect of abscisic acid and abscisic acid metabolites on the germination of cress seed J. M. Ourcival, M. Méthy et R. Burgess Mise en évidence, par la fluorescence de la chlorophylle, de la variabilité génotypique de la réponse a une contrainte hydrique chez le tréfle blanc (Trifolium repens) et l’ivraie vivace (Lolium perenne) P. Halama et L. Lacoste Déterminisme de la reproduction sexuée du Phaeosphaeria (Leptosphaeria) nodorum agent de la septoriose du blé. II. Action de la température et de la lumiére C. H. A. Snijders and C. F. Krechting Inhibition of deoxynivalenol translocation and fungal colonization in Fusarium head blight resistant wheat M. J. Sumner Embryology of Brassica campestris: the entrance and discharge of the pollen tube in the synergid and the formation of the zygote V. A. Berdnikov, V. S. Bogdanova, S. M. Rozov, and F. L. Gorel Territorial distribution of histone H1 alleles in a population of Vicia unijuga formed after urbanization of natural habitat S. P. Bentivenga and B. A. D. Hetrick Seasonal and temperature effects on mycorrhizal activity and dependence of cool- and warm-season tallgrass prairie grasses Doug Brown Estimating the composition of a forest seed bank: a comparison of the seed extraction and seedling emergence methods P. Kainulainen, J. Oksanen, V. Palomaki, J. K. Holopainen, and T. Holopainen Effect of drought and waterlogging stress on needle monoterpenes of Picea abies R. A. Shoemaker and C. E. Babcock Applanodictyosporous Pleosporales: Clathrospora, Comoclathris, Graphyllium, Macrospora, and Platysporoides Stephanie A. Foré, R. James Hickey, John L. Vankat, Sheldon I. Guttman, and Robert L. Schaefer Genetic structure after forest fragmentation: a landscape ecology perspective on Acer saccharum Kirk J. Czymmek and Karen L. Klomparens The ultrastructure of ascosporogenesis in freeze-substituted Thelebolus crustaceus: enveloping membrane system and ascospore initial development Gaku Kudo Effect of snow-free duration on leaf life-span of four alpine plant species Douglas W. White and Edmund W. Stiles Bird dispersal of fruits of species introduced into eastern North America L. M. Reid, D. E. Mather, J. T. Arnason, R. I. Hamilton, and A. T. Bolton Changes in phenolic constituents of maize silk infected with Fusarium graminearum K. W. Cullings and T. D. Bruns Phylogenetic origin of the Monotropoideae inferred from partial 28S ribosomal RNA gene sequences L. Rey, A. Sadik, A. Fer et S. Renaudin Etude de quelques aspects du métabolisme carboné et azoté chez |’Arceuthobium oxycedri, gui nain du genévrier SEPTEMBER / SEPTEMBRE ARTICLES R. J. N. Emery and C. C. Chinnappa Natural hybridization between Stellaria longipes and Stellaria borealis (Caryophyllaceae) Mei-Lee Wu and Richard T. Hanlin Host—parasite relationships between the fungus Leptosphaerulina crassiasca and peanut D. E. Mayhew, A. L. Cook, and T. J. Gulya__ Isolation and characterization of a mycovirus from Plasmopara halstedii Jinliang Li and I. Brent Heath The phylogenetic relationships of the anaerobic chytridiomycetous gut fungi (Neocallimasticaceae) and the Chytri- diomycota. I. Cladistic analysis of rRNA sequences Channarayappa, V. Muniyappa, D. Schwegler-Berry, and G. Shivashankar Ultrastructural changes in tomato infected with tomato leaf curl virus, a whitefly-transmitted geminivirus J. A. Johnson and N. J. Whitney Isolation of fungal endophytes from black spruce (Picea mariana) dormant buds and needles from New Brunswick, Canada Nils Hallenberg and Ellen Larsson Mating biology in Peniophora cinerea (Basidiomycetes) L. P. Ronse Decraene and E. F. Smets An updated interpretation of the androecium of the Fumariaceae O. W. Van Auken, J. K. Bush, and David D. Diamond Changes in species biomass in the Coastal Prairie of Texas when light and nutrients are altered C-8 CAN. J. BOTANY VOL. 70, 1992 David E. Carr The relationship between crop size and fruit removal and its implication for the evolution of dioecy Jun Q. Xia, Fleet N. Lee, and Kyung S. Kim Monoclonal antibodies to an extracellular component of Pyricularia grisea Andrew C. Schuerger and David J. Mitchell Effects of temperature, hydrogen ion concentration, humidity, and light quality on disease caused by Fusarium solani f.sp. phaseoli in mung bean J. Vieth, G. Laublin, C. Morisset et M. Cappadocia Multiplication in vitro de quelques iris 4 partir de racines : aspects histologiques de l‘embryogenése somatique Issei Kobayashi, Yuhko Kobayashi, Naoto Yamaoka, and Hitoshi Kunoh Recognition of a pathogen and a nonpathogen by barley coleoptile cells. III. Responses of microtubules and actin filaments in barley coleoptile cells to penetration attempts Hamed K. Abbas, Rex N. Paul, C. Douglas Boyette, Stephen O. Duke, and Ronald F. Vesonder Physiological and ultrastructural effects of fumonisin on jimsonweed leaves Marc Philippe Un déterminisme architectural pour les bois de coniféres 4 ponctuation mixte (Protopinaceae Kraiisel, 1917)? Loic Pagés Mini-rhizotrons transparents pour |’étude du syst¢me racinaire de jeunes plantes. Application a la caractérisation du développement racinaire de jeunes chénes (Quercus robur) P. E. Lauri Données sur le contexte végétatif lié a la floraison chez le cerisier (Prunus avium) Louisa Squires and A. G. van der Valk Water-depth tolerances of the dominant emergent macrophytes of the Delta Marsh, Manitoba Martin L. Cipollini and Edmund W. Stiles Relative risks of fungal rot for temperate ericaceous fruits: effects of seasonal variation on selection for chemical defense Gina Holguin and Yoav Bashan Increased aggressiveness of Alternaria macrospora, a causal agent of leaf blight in cotton monoculture C. B. Pandey and J. S. Singh Influence of rainfall and grazing on belowground biomass dynamics in a dry tropical savanna Pedro G. Lloret and Antonio Pulgarin Effect of naphthaleneacetic acid on the formation of lateral roots in the adventitious root of Allium cepa: number and arrangement of laterals along the parent root R. Lefebvre, J. Vasseur, E. Backoula et J.-P. Couillerot Participation du métabolisme glucidique 4 |’orientation organogéne de tissus du Cichorium intybus cultivés in vitro Abdellatif Beghdadi, Claude Richard et Daniel Dostaler L’ Aphanomyces euteiches des luzernitres du Québec : isolement, morphologie et variabilité de la croissance et du pouvoir pathogéne NOTES Steven Y. Newell Autumn distribution of marine Pythiaceae across a mangrove —saltmarsh boundary Bodil S¢gaard and Hans Doll A positive allelopathic effect of corn cockle, Agrostemma githago, on wheat, Triticum aestivum OCTOBER / OCTOBRE ARTICLES K. Klinka, Q. Wang, G. J. Kayahara, R. E. Carter, and B. A. Blackwell Light-growth response relationships in Pacific silver fir (Abies amabilis) and subalpine fir (Abies lasiocarpa) M. R. T. Dale, A. G. Thomas, and E. A. John Environmental factors including management practices as correlates of weed community composition in spring seeded crops Susan G. Aiken and George Fedak Cytotaxonomic observations on North American Festuca (Poaceae) Keiko Kitamura and Mohamad Yusof Bin Abdul Rahman _ Genetic diversity among natural populations of Agathis borneensis (Araucari- aceae), a tropical rain forest conifer from Brunei Darussalam, Borneo, Southeast Asia Gary J. Griffin American chestnut survival in understory mesic sites following the chestnut blight pandemic J. Hattori, R. G. Rutledge, B. L. Miki, and B. R. Baum DNA sequence relationships and origins of acetohydroxy acid synthase genes of Brassica napus Brian A. Fineran and Judith M. Fineran Teliospore wall structure in Entorrhiza (Tilletiaceae) and its relationship to taxonomy of the genus Koei Hamana, Shigeru Matsuzaki, Masaru Niitsu, and Keijiro Samejima Distribution of unusual polyamines in leguminous seeds Francoise Van Miegroet et Michel Dujardin Cytologic et histologie de la reproduction chez le Nymphaea heudelotii Walter Nagl The polytenic endosperm haustorium of Rhinanthus minor (Scrophulariaceae): functional ultrastructure Robert Hall and Lana Gay Phillips Effects of crop sequence and rainfall on population dynamics of Fusarium solani f.sp. phaseoli in soil Godo Stoyke, K. N. Egger, and R. S. Currah Characterization of sterile endophytic fungi from the mycorrhizae of subalpine plants Wilma L. Lingle, Ronald P. Clay, and David Porter Ultrastructural analysis of basidiosporogenesis in Panellus stypticus K. C. Nagarathna, Sudheer A. Shetty, H. S. Prakash, S. G. Bhat, and H. Shekara Shetty Lipoxygenase activity in fresh, stored, and germinating pearl millet seeds resistant and susceptible to downy mildew disease B. A. D. Hetrick, G. W. T. Wilson, and T. S. Cox Mycorrhizal dependence of modern wheat varieties, landraces, and ancestors R. Médard, Y. Sell et P. Barnola Le développement du bourgeon axillaire du Manihot esculenta CONTENTS/SOMMAIRE C-9 R. Médard, J. M. N. Walter et P. Barnola Influence, chez le Manihot esculenta, du développement de la lame du limbe sur celui du pétiole et de l’entre-noeud sousjacent 2053 Sandra C. Lindstrom and Kathleen M. Cole A revision of the species of Porphyra (Rhodophyta: Bangiales) occurring in British Columbia and adjacent waters 2066 Fifth International Marine Mycology Symposium A symposium sponsored by the Departments of Botany and Oceanography, The University of British Columbia, Vancouver, B.C. Le cinqui¢me symposium international sur la mycologie marine Un symposium parrainé par les départements de botanique et d’océanographie, The University of British Columbia, Vancouver (Colombie-Britannique) Gilbert C. Hughes Introduction 2079 Lisa K. Muehlstein The host—pathogen interaction in the wasting disease of eelgrass, Zostera marina 2081 Susan J. Stanley Observations on the seasonal occurrence of marine endophytic and parasitic fungi 2089 N. J. W. Clipson and D. H. Jennings Dendryphiella salina and Debaryomyces hansenii: models for ecophysical adaptation to salinity by fungi that grow in the sea 2097 S. Rohrmann, R. Lorenz, and H. P. Molitoris Use of natural and artificial seawater for investigation of growth, fruit body production, and enzyme activities in marine fungi 2106 R. Lorenz and H. P. Molitoris Combined influence of salinity and temperature (Phoma-pattern) on growth of marine fungi 2111 S. Rohrmann and H. P. Molitoris Screening for wood-degrading enzymes in marine fungi 2116 NOVEM/ BNOEVEMRBR E ARTICLES Walter D. Willms and Joanna Fraser Growth characteristics of rough fescue (Festuca scabrella var. campestris) after three years of repeated harvesting at scheduled frequencies and heights Eckhard George, Karl-Uwe Haussler, Doris Vetterlein, Eva Gorgus, and Horst Marschner Water and nutrient translocation by hyphae of Glomus mosseae J. B. Phipps Heteromeles and Photinia (Rosaceae, subfam. Maloideae) of Mexico and Central America D. J. S. Barr and N. L. Désaulniers The flagellar apparatus in zoospores of Phytophthora, Pythium, and Halophytophthora P. W. J. van Wyk and M. J. Wingfield Ascospore development in Ophiostoma piceae Margaret M. Carreiro and R. E. Koske Effect of temperature on decomposition and development of microfungal communities in leaf litter microcosms Channarayappa, G. Shivashankar, V. Muniyappa, and R. H. Frist Resistance of Lycopersicon species to Bemisia tabaci, a tomato leaf curl virus vector 2184 Clinton F. Hodges Pathogenicity of Pythium torulosum to roots of Agrostis palustris in black-layered sand produced by the interaction of the cyanobacteria species Lyngbya, Phormidium, and Nostoc with Desulfovibrio desulfuricans 2193 Anne E. Jackson, Stephen W. Ayer, and Maurice V. Laycock The effect of salinity on growth and amino acid composition in the marine diatom Nitzschia pungens 2198 Walter Litten, John M. Smagula, and Yolande Dalpé Growth of micropropagated lowbush blueberry with defined fungi in irradiated peat mix 2202 René J. Belland, W. B. Schofield, and Terry A. Hedderson Bryophytes of Mingan Archipelago National Park Reserve, Quebec: a boreal flora with arctic and alpine components 2207 S. J. Read, S.-Y. Hsieh, E. B. G. Jones, S. T. Moss, and H. S. Chang Paraliomyces lentiferus: an ultrastructural study of a little-known marine ascomycete 2223 Alban D. Barnabas and Carol A. Peterson Development of Casparian bands and suberin lamellae in the endodermis of onion roots 2233 D. P. Dharmawardhana, B. E. Ellis, and J. E. Carlson Characterization of vascular lignification in Arabidopsis thaliana 2238 Bryan D. McKersie, R. L. Peterson, Stephen R. Bowley, and Shankar Das _ Ultrastructural and genetic characterization of a mutant exhibiting starch accumulation and premature leaf senescence in Medicago sativa 2245 M. I. N. Zhang and J. H. M. Willison Electrical impedance analysis in plant tissues: in vivo detection of freezing injury 2254 Adele Post and Maret Vesk Photosynthesis, pigments, and chloroplast ultrastructure of an Antarctic liverwort from sun-exposed and shaded sites 2259 Zhijun Liu and Donald I. Dickmann Responses of two hybrid Populus clones to flooding, drought, and nitrogen availability. 1. Morphology and growth 2265 Christian Messier Effects of neutral shade and growing media on growth, biomass allocation, and competitive ability of Gaultheria shallon 2271 D. F. Greene and E. A. Johnson = Fruit abscission in Acer saccharinum with reference to seed dispersal 2277 c-10 CAN. J. BOTANY VOL. 70, 1992 G. Cambon, J. C. Ritchie et P. Guinet Pollen marqueur de transports 4 longue distance dans |’atmosphére du sud de |’Ontario (Canada) Jacques Tardif et Yves Bergeron Analyse écologique des peuplements de fréne noir (Fraxinus nigra) des rives du lac Duparquet, nord-ouest du Québec S. 1. Warwick, B. K. Thompson, and L. D. Black Hybridization of Carduus nutans and Carduus acanthoides (Compositae): morphological variation in F, hybrids and backcrosses NOTE Shiro Tsuyuzaki and Tatsuichi Tsujii Size and shape of Carex meyeriana tussocks in an alpine wetland, northern Sichuan Province, China COMMENTARIES / COMMENTAIRES J. G. Chmielewski and C. C. Chinnappa Commentary on Bayer’s use of incomplete data matrices and weighted qualitative characters in phenetic studies of North American Antennaria: Commentary Randall J. Bayer Some observations on morphometric analyses of Antennaria (Asteraceae: Inuleae): Reply DECEMBER / DECEMBRE ARTICLES Mark D. Lazzaro and William W. Thomson Ultrastructural localization of calcium in the organic acid secreting trichomes of chickpea (Cicer arietinum) Jacques Rembur, Arlette Nougaréde, Pierre Rondet, and Dennis Francis Floral-specific polypeptides in Silene coeli-rosa E. G. Reekie and P. Wayne Leaf canopy display, stomatal conductance, and photosynthesis in seedlings of three tropical pioneer tree species subjected to drought Melanie C. Trull, Brian L. Holaway, and Russell L. Malmberg Development of stigmatoid anthers in a tobacco mutant: implications for regulation of stigma differentiation G. A. O’ Neill, C. P. Chanway, P. E. Axelrood, R. A. Radley, and F. B. Holl An assessment of spruce growth response specificity after inoculation with coexistent rhizosphere bacteria Carol C. Baskin, Jerry M. Baskin, and O. W. Van Auken Germination response patterns to temperature during afterripening of achenes of four Texas winter annual Asteraceae Paul F. Maycock and Dianne Fahselt Vegetation of stressed calcareous screes and slopes in Sverdrup Pass, Ellesmere Island, Canada Mary V. Santelmann Cellulose mass loss in ombrotrophic bogs of northeastern North America George J. Wilder and Jeffrey R. Johansen Comparative anatomy of absorbing roots and anchoring roots in three species of Cyclanthaceae (Monocotyledoneae) J. H. C. Cornelissen Seasonal and year to year variation in performance of Gordonia acuminata seedlings in different light environments S. J. Darbyshire and S. 1. Warwick Phylogeny of North American Festuca (Poaceae) and related genera using chloroplast DNA restriction site Variation Maria Eliana Ramirez and Akira F. Peters The South American species of Desmarestia (Phaeophyceae) Francis I. Molina, Peng Shen, Shung-Chang Jong, and Kazuhiko Orikono Molecular evidence supports the separation of Lentinula edodes from Lentinus and related genera Zohra Fortas et Gérard Chevalier Effet des conditions de culture sur la mycorhization de |'Helianthemum guttatum par trois espéces de terfez des genres Terfezia et Tirmania d Algérie Michéle C. Heath Host species specificity of the goldenrod rust fungus and the existence of rust resistance within some goldenrod species Kevin E. Gedge and M. A. Maun Effects of simulated herbivory on growth and reproduction of two beach annuals, Cakile edentula and Corispermum hyssopifolium Terri A. Suttill and Geraldine A. Allen Morphological and chromosomal variation in Dodecatheon pulchellum (Primulaceae) Amanda L. Siegfried, Keith A. Seifert, and Barton C. Bilmer A new species of Phialocephala (Hyphomycetes) Bruce K. Kirchoff Ovary structure and anatomy in the Heliconiaceae and Musaceae (Zingiberales) NOTES Robert A. Tisdale and T. Evan Nebeker Resin flow as a function of height along the bole of loblolly pine Charles E. Umbanhowar, Jr. Erratum: Abundance, vegetation, and environment of four patch types in a northern mixed prairie Note of appreciation / Note de reconnaissance Author index for Volume 70 / Index des auteurs pour le volume 70 Subject index for Volume 70 / Index des matiéres pour le volume 70 Contents for Volume 70 / Sommaire pour le volume 70

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Canadian Journal of Botany 1992: Vol 70 Table of Contents PDF

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Preview Canadian Journal of Botany 1992: Vol 70 Table of Contents

CANADIAN JOURNAL REVUE CANADIENNE OF BOTANY DE BOTANIQUE Volume 70, 1992 Contents /Sommaire JANUARY / JANVIER ARTICLES Halvor Solheim The early stages of fungal invasion in Norway spruce infested by the bark beetle Ips typographus K. D. Bennett Holocene history of forest trees on the Bruce Peninsula, southern Ontario Jian-Guo Gao and Annette Nassuth Cytological changes induced by wheat streak mosaic virus in cereal leaf tissues Kathryn M. Jacobson and Orson K. Miller, Jr. Physiological variation between tree-associated populations of Suillus granulatus as determined by in vitro mycorrhizal synthesis experiments Monique Beuve and Hervé Lapierre Resistance to RPV barley yellow dwarf virus in the genus Bromus George J. Wilder Comparative morphology and anatomy of absorbing roots and anchoring roots in three species of Cyclanthaceae (Monocotyledoneae) X. S. Ye, U. Jarifors, S. Tuzun, S. Q. Pan, and J. Kuc Biochemical changes in cell walls and cellular responses of tobacco leaves related to systemic resistance to blue mold (Peronospora tabacina) induced by tobacco mosaic virus Jeffrey G. Duckett and Roberto Ligrone A light and electron microscope study of the fungal endophytes in the sporophyte and gametophyte of Lycopodium cernuum with observations on the gametophyte —sporophyte junction Gisela Cuenca and Milagros Lovera Vesicular—arbuscular mycorrhizae in disturbed and revegetated sites from La Gran Sabana, Venezuela W. W. Mitchell Cytogeographic races of Arctagrostis latifolia (Poaceae) in Alaska Koji Iwase Gluconic acid synthesis by the ectomycorrhizal fungus Tricholoma robustum Stefan Andersson Phenotypic selection in a population of Crepis tectorum ssp. pumila (Asteraceae) A. J. Kuthubutheen, G. M. Liew, and A. Nawawi Nawawia nitida anam. sp.nov. (Hyphomycetes) and further records of Nawawia filiformis from Malaysia A. J. Kuthubutheen and A. Nawawi_ New litter-inhabiting hyphomycetes from Malaysia: Isthmophragmospora verruculosa, lyengarina asym- metrica, and lyengarina furcata Branka Stevanovic, Pham Thi Anh Thu, Fernando Monteiro de Paula, and Jorge Vieira da Silva Effects of dehydration and rehydration on the polar lipid and fatty acid composition of Ramonda species Michael J. R. Mould and Jane Robb The Colletotrichum trifolii — Medicago sativa interface, in culture: a cytological analysis H. B. Massicotte, J. M. Trappe, R. L. Peterson, and L. H. Melville Studies on Cenococcum geophilum. I. Sclerotium morphology, germination, and formation in pure culture and growth pouches R. E. Redmann and M. Q. Qi_ Impacts of seeding depth on emergence and seedling structure in eight perennial grasses Thomas Sawidis and George Heinrich Cesium-137 monitoring using lichens and mosses from northern Greece Charles E. Umbanhowar, Jr. Early patterns of revegetation of artificial earthen mounds in a northern mixed prairie S. G. Mansfield and L. G. Briarty Cotyledon cell development in Arabidopsis thaliana during reserve deposition Masahiro Kato and Ryoko Imaichi Leaf anatomy of tropical fern rheophytes, with its evolutionary and ecological implications Luc C. Duchesne and Pierre J. Charest Effect of promoter sequence on transient expression of the 8-glucuronidase gene in embryogenic calli of Larix Xeurolepis and Picea mariana following microprojection Christian Godbout and J. André Fortin Effects of nitrogen fertilization and photoperiod on basidiome formation of Laccaria bicolor associated with container-grown jack pine seedlings A. R. Biggs and G. R. Alm Response of peach bark tissues to inoculation with epiphytic fungi alone and in combination with Leucostoma cincta Victor C. Runeckles and Manivalde Vaartnou Observations on the in situ detection of free radicals in leaves using electron paramagnetic resonance spectrometry Andrea L. Corbett, Pam G. Krannitz, and Lonnie W. Aarssen The influence of petals on reproductive success in the arctic poppy (Papaver radicatum) Jefferson G. Lebkuecher and William G. Eickmeier Photoinhibition of photophosphorylation, adenosine triphosphate content, and glyceraldehyde-3-phosphate dehydrogenase (NADP* ) following high-irradiance desiccation of Selaginella lepidophylla W. Greenaway, S. English, and F. R. Whatley Relationships of Populus <acuminata and Populus x generosa with their parental species examined by gas chromatography — mass spectrometry of bud exudates NOTES J. Chong, Z. Kang, W. K. Kim, and R. Rohringer Multinucleate condition of Puccinia striiformis in colonies isolated from infected wheat leaves with macerating enzymes C-1 C-2 CAN. J. BOTANY VOL. 70, 1992 Kazuhiro Toyoda, Tomonori Shiraishi, Issei Kobayashi, Naoto Yamaoka, and Hitoshi Kunoh Treatment of a single plant cell with chemicals Instructions to authors Recommandations aux auteurs FEBRUARY/FEVRIER ARTICLES David J. Rawlence Paleophycology and Long Lake, Saint John County, New Brunswick, Canada, based on diatom distribution in sediments J. M. Leggett, G. Ladizinsky, P. Hagberg, and M. Obanni The distribution of nine Avena species in Spain and Morocco Warren H. Wagner, Jr., Florence S. Wagner, Anton A. Reznicek, and Charles R. Werth Dryostichum singulare (Dryopteridaceae), a new fern nothogenus from Ontario F. Jailloux Jn vitro production of the teleomorph of Guignardia bidwellii, causal agent of black rot of grapevine Claudia Erbar Floral development of two species of Stylidium (Stylidiaceae) and some remarks on the systematic position of the family Stylidiaceae M. Nilsson, E. Baath, and B. Séderstrém The microfungal communities of a mixed mire in northern Sweden Charles E. Umbanhowar, Jr. Abundance, vegetation, and environment of four patch types in a northern mixed prairie Jeannette Whitton and John F. Bain An analysis of morphological variation in Senecio cymbalaria (Asteraceae) K. A. Richardson, R. L. Peterson, and R. S. Currah Seed reserves and early symbiotic protocorm development of Platanthera hyperborea (Orchidaceae) Jacob Garty The postfire recovery of rock-inhabiting algae, microfungi, and lichens Henriette Giese Replication of DNA during barley endosperm development G. A. Wheeler, E. J. Cushing, E. Gorham, T. Morley, and G. B. Ownbey A major floristic boundary in Minnesota: an analysis of 280 taxa occurring in the western and southern portions of the state T. J. Gulya, T. P. Freeman, and D. E. Mayhew Ultrastructure of virus-like particles in Plasmopara halstedii Christopher H. Briand, Usher Posluszny, and Douglas W. Larson Differential axis architecture in Thuja occidentalis (eastern white cedar) I. Waters and J. M. Shay Effect of water depth on population parameters of a Typha glauca stand Anil Grover and Deepak Pental _Interrelationships of Oryza species on electrophoretic patterns of alcohol dehydrogenase James A. Kolmer Effect of sexual recombination in two populations of the wheat leaf rust fungus Puccinia recondita Suzanne S. Sanxter, Harry Y. Yamamoto, David G. Fisher, and Harvey T. Chan, Jr. Development and decline of chloroplasts in exocarp of Carica papaya Ernst von Rudloff and Martin S. Lapp Chemosystematic studies in the genus Pinus. VII. The leaf oil terpene composition of ponderosa pine, Pinus ponderosa T. T. Chang and W. H. Ko Inheritance of isozyme production and sexual reproduction in Phytophthora infestans T. R. Seastedt, W. J. Parton, and D. S. Ojima_ Mass loss and nitrogen dynamics of decaying litter of grasslands: the apparent low nitrogen immobilization potential of root detritus A. J. M. Van der Sman, C. W. P. M. Blom, and H. M. Van de Steeg Phenology and seed production in Chenopodium rubrum, Rumex maritimus, and Rumex palustris as related to photoperiod in river forelands E. W. A. Boehm, J. C. Wenstrom, D. J. McLaughlin, L. J. Szabo, A. P. Roelfs, and W. R. Bushnell An ultrastructural pachytene karyotype for Puccinia graminis f.sp. tritici E. Horak and O. K. Miller, Jr. Phaeogalera and Galerina in arctic-subarctic Alaska (U.S.A.) and the Yukon Territory (Canada) NOTES Christopher H. Briand, Usher Posluszny, and Douglas W. Larson Comparative seed morphology of Thuja occidentalis (eastern white cedar) from upland and lowland sites Hironori Koga, Takao Tsukiboshi, and Tsutomu Uematsu Application of an osmium-maceration technique to observe plant—microbe interfaces of Italian ryegrass and crown rust fungi by scanning electron microscopy COMMENTAIRE/COMMENTARY Claude Richard, Ginette Fortier et Bernard Boullard L’usage de |’article devant le binéme latin désignant les espéces du monde vivant MARCH/ MARS ARTICLES Donald M. Britton and Daniel F. Brunton Isoetes xjeffreyi, hyb.nov., a new Isoetes (Isoetes macrospora x Isoetes riparia) from Quebec, Canada CONTENTS/SOMMAIRE Ian D. Reid Demethylation of the lignin model dimer 1-(3',4'-dimethoxyphenyl)-2-(o-methoxyphenoxy)-prop,a3n-dei-o l by the white-rot fungus Phlebia tremellosa Edward C. Yeung and Sandra K. Law Embryology of Calypso bulbosa. Il. Embryo development George W. Argus The phytogeography of rare vascular plants in Ontario and its bearing on plant conservation Hilary R. Skilnyk and John N. A. Lott Mineral analyses of storage reserves of Cucurbita maxima and Cucurbita andreana pollen Bernard R. Baum and L. Grant Bailey Morphometric study of three closely related South American species of Hordeum section Stenostachys (Poaceae) Gijs J. H. van Rooijen, Ronald W. Wilen, Larry A. Holbrook, and Maurice M. Moloney Regulation of accumulation of mRNAs encoding a 20-kDa oil-body protein in microspore-derived embryos of Brassica napus J. E. Staub, L. D. Knerr, D. J. Holder, and B. May Phylogenetic relationships among several African Cucumis species Ping Chen and John N. A. Lott Studies of Capsicum annuum seeds: structure, storage reserves, and mineral nutrients Dennis E. Desjardin, George J. Wong, and Don E. Hemmes Agaricales of the Hawaiian Islands. I. Marasmioid fungi: new species, new distributional records, and poorly known taxa Hugh Tyson Relationships, derived from optimum alignments, among amino acid sequences of plant peroxidases L. Shain and J. B. Miller Movement of cytoplasmic hypovirulence agents in chestnut blight cankers Marguerite Kane and Paul B. Cavers Patterns of seed weight distribution and germination with time in a weedy biotype of proso millet (Panicum miliaceum) Clinton F. Hodges Vegetative growth and sporulation of Bipolaris sorokiniana on infected leaves of Poa pratensis exposed to postemergence herbicides Richard Cété, Jean M. Gerrath, Usher Posluszny, and Bernard Grodzinski Comparative leaf development of conventional and semi- leafless peas (Pisum sativum) J. Nielsen Ustilago spp. pathogenic on Aegilops. Ill. Ustilago phrygica, with a descriptive key to all three Ustilago spp. on Aegilops Jerry M. Baskin and Carol C. Baskin Role of temperature and light in the germination ecology of buried seeds of weedy species of disturbed forests. I. Lobelia inflata Sylvia Kelso Conspectus of the genus Douglasia (Primulaceae) with comments on Douglasia alaskana, an Alaska— Yukon alpine endemic David Racusen and Richard Racusen Esterase activity and structural heterogeneity in patatin from a wild potato species K. Hasebe, S. Murakami, and A. Tsuneda Cytology and genetics of a dikaryotic strain of Lentinus edodes carrying two haplolethal factors Suzanne Aldington and Stephen C. Fry Plant cell wall-lysing enzymes in the apoplast of tomato leaves infected with Fulvia fulva George H. La Roi Classification and ordination of southern boreal forests from the Hondo — Slave Lake area of central Alberta Kerry O’Donnell Ultrastructure of meiosis and the spindle pole body cycle in freeze-substituted basidia of the smut fungi Ustilago maydis and Ustilago avenae John Bissett Trichoderma atroviride Raymond Louis Tremblay Trends in the pollination ecology of the Orchidaceae: evolution and systematics NOTES Tomohiro Kiyosue, Shinobu Satoh, Hiroshi Kamada, and Hiroshi Harada Immunological detection of an embryogenic-cell protein (ECP31) during stress-induced somatic embryogenesis in carrot Paul G. Harrison and Cynthia Durance Variation in clonal structure in an eelgrass (Zostera marina) meadow on the Pacific coast of Canada APRIL/ AVRIL Canadian Botanical Association symposium on the role of structure and development in evolution A symposium sponsored by the Canadian Botanical Association L’ Association botanique du Canada symposium : |’évolution et importance de la structure et du développement Un symposium supporté par |’Association botanique du Canada Usher Posluszny and Jean M. Gerrath Introduction 659 R. L. Peterson Adaptations of root structure in relation to biotic and abiotic factors 661 Nancy G. Dengler Patterns of leaf development in anisophyllous shoots Shirley C. Tucker The role of floral development in studies of legume evolution V. K. Sawhney Floral mutants in tomato: development, physiology, and evolutionary implications Rolf Sattler Process morphology: structural dynamics in development and evolution ARTICLES J. J. Pasternak and B. R. Glick Molecular evolutionary analyses of the small and large subunits of ribulose-1,5-bisphosphate carboxylase/ oxygenase C-4 CAN. J. BOTANY VOL. 70, 1992 G. Hausner, G. G. Eyjélfsdéttir, J. Reid, and G. R. Klassen Two additional species of the genus Togninia J. Buffard-Morel, J.-L. Verdeil et C. Pannetier Embryogenése somatique du cocotier (Cocos nucifera L.) a partir d’explants foliaires : histologique E. E. Mclver Fossil Fokienia (Cupressaceae) from the Paleocene of Alberta, Canada Martha J. Powell and Sonali Roychoudhury Ultrastructural organization of Rhizophlyctis harderi zoospores and redefinition of the type | microbody — lipid globule complex Sonali Roychoudhury and Martha J. Powell Precise flagellar configuration of the Rhizophlyctis harderi zoospore E. R. Littley and J. E. Rahe Sclerotial morphogenesis in Sclerotium cepivorum in vitro Michéle C. Heath, Richard J. Howard, Barbara Valent, and Forrest G. Chumley Ultrastructural interactions of one strain of Magnaporthe grisea with goosegrass and weeping lovegrass Alfredo D. Martinez-Espinoza, Karla J. Dugan, Michael E. Bjarko, and John E. Sherwood Improved media for testing the mating reaction and genetic complementation of Ustilago hordei Robert K. Antibus, Robert L. Sinsabaugh, and Arthur E. Linkins Phosphatase activities and phosphorus uptake from inositol phosphate by ectomycorrhizal fungi K. Fuchs and K. P. Pauls Flow cytometric characterization of microspore development in Brassica napus Stephen B. Goodwin, Robert W. Allard, Shirlee A. Hardy, and Robert K. Webster Hierarchical structure of pathogenic variation among Rhynchosporium secalis populations in Idaho and Oregon Elizabeth John Distribution patterns and interthalline interactions of epiphytic foliose lichens S. Greipsson and A. A. Crowder Amelioration of copper and nickel toxicity by iron plaque on roots of rice (Oryza sativa) S. J. Read, S. T. Moss, and E. B. G. Jones Germination and development of attachment structures by conidia of aquatic Hyphomycetes light microscope studies S. J. Read, S. T. Moss, and E. B. G. Jones Germination and development of attachment structures by conidia of aquatic Hyphomycetes: a scanning electron microscope study M. A. McLean and J. C. Sutton Mycoflora of strawberry in Ontario Gregor Langen, Bernd Beis#mann, Hans J. Reisener, and Kalle Kogel A §-1,3-p-endo-mannanase from culture filtrates of the hyyppeer - parasites Verticillium lecanii and Aphanocladium album that specifically lyses the germ pore plug from uredospores of Puccinia graminis f.sp. tritici C. Kerfourn and J. P. Garrec Modifications in the alkane composition of cuticular waxes from spruce needles (Picea abies) and ivy leaves (Hedera helix) exposed to ozone fumigation and acid fog: comparison with needles from declining spruce trees H. F. G. Van Dijk, M. Van der Gaag, P. J. M. Perik, and J. G. M. Roelofs Nutrieat availability in Corsican pine stands in The Netherlands and the occurrence of Sphaeropsis sapinea: a field study Douja Ben Miled-Daoud et Abdelkader Cherif Effet du NaC! sur lutilisation des lipides et les activités enzymatiques glyoxysomales au cours de la germination de deux espéces de Medicago May/ Mal INVITED ARTICLE MARCH 1992 / ARTICLE SOLLICITE MARS 1992 Gijs J. H. van Rooijen, Ronald W. Wilen, Larry A. Holbrook, and Maurice M. Moloney Regulation of accumulation of mRNAs encoding a 20-kDa oil-body protein in microspore-derived embryos of Brassica napus INVITED REVIEW / SYNTHESE SOLLICITEE Héléne Sanfagon Regulation of mRNA formation in plants: lessons from the cauliflower mosaic virus transcription signals ARTICLES Kevin B. Jensen, S. L. Hatch, and J. K. Wipff Cytology and morphology of Pseudoroegneria deweyi (Poaceae: Triticeae): a new species from the foot hills of the Caucasus Mountains (Russia) L. Waterkeyn, A. Bienfait et T. Monniez Les cystides a cristaux des Inocybes (Agaricales) : étude histochimique et cristallographique Larry Hufford Leaf structure of Besseya and Synthyris (Scrophulariaceae) E. Garnier-Sillam, I. Grech, Y. Czaninski, M.-T. Tollier et B. Monties Etude cytochimique ultrastructurale de la dégradation des lignines dans les résidus pariétaux de bois d’épicéa et de peuplier par le Reticulitermes lucifugus var. santonensis (Rhinotermitidae, Isoptera) Dan O. Chellemi and James J. Marois Population dynamics of the plant pathogenic fungus Uncinula necator G. Ouzounidou, E. P. Eleftheriou, and S. Karataglis Ecophysical and ultrastructural effects of copper in Thlaspi ochroleucum (Cruciferae) Jon Lovett Doust The influence of plant density on flower, fruit, and leaf demography in bush bean, Phaseolus vulgaris Darleen A. DeMason, Daniel Widney, and James I. Stillman /n vitro and transplantation experiments with germination of date embryos Marie Claude G. Trudel and J. K. Morton Pollen morphology and taxonomy in North American Labiatae Perla Hamon, Jean-Paul Brizard, Jeanne Zoundjihékpon, Christophe Duperray et Alain Borgel Etude des index d’ADN de huit espéces d’ignames (Dioscorea sp.) par cytométrie en flux CONTENTS/SOMMAIRE Suzanne Bertrand, Nicole Benhamou, Paul Nadeau, Daniel Dostaler, and André Gosselin Immunogold localization of free abscisic acid in tomato root cells S. N. Acharya, C. B. Chu, R. Hermesh, and G. B. Schaalje Factors affecting red-osier dogwood seed germination James L. Kerwin, Lisa M. Johnson, Howard C. Whisler, and Amy R. Tuininga Infection and morphogenesis of Pythium marinum in species of Porphyra and other red algae C. P. Chanway and F. B. Holl Influence of soil biota on Douglas-fir (Pseudotsuga menziesii) seedling growth: the role of rhizosphere bacteria D. A. Neher, H. T. Wilkinson, and C. K. Augspurger Progression of damping-off epidemics in Glycine populations of even-age and mixed-age structure Barbara F. Palser, John L. Rouse, and Elizabeth G. Williams A scanning electron microscope study of the pollen tube pathway in pistils of Rhododendron D. W. T. Au, I. J. Hodgkiss, and L. L. P. Vrijmoed Decomposition of Bauhinia purpurea leaf litter in a polluted and unpolluted Hong Kong waterway D. W. T. Au, I. J. Hodgkiss, and L. L. P. Vrijmoed Fungi and cellulolytic activity associated with decomposition of Bauhinia purpurea leaf litter in a polluted and unpolluted Hong Kong waterway Jean-Daniel Viémont et Francois Beaujard Les bruyéres in vitro. IX. Edification du systeme racinaire adventif chez l’Erica xdarleyensis; mise en évidence d’une rythmicité Ahmed Fathi Oueida et Marie-Odile Desbiez Influence de la qualité de |’éclairement sur les corrélations entre le cotylédon et son bourgeon axillaire chez le Linum usitatissimum NOTES Dan O. Chellemi and Kerry O. Britton Influence of canopy microclimate on incidence and severity of dogwood anthracnose Paulette Tai Chun and Leslie G. Hickok Inheritance of two mutations conferring glyphosate tolerance in the fern Ceratopteris richardii JUNE/ JUIN ARTICLES Leonardo Galetto and Luis M. Bernardello Extrafloral nectaries that attract ants in Bromeliaceae: structure and nectar composition Denis Barabé, Luc Brouillet et Charles Bertrand Organogénie de la feuille du Begonia radicans Vellozo et du Begonia scabrida (Begoniaceae) X. Y. Wang, C. G. Suhayda, and R. E. Redmann_ Identification of physiological ecotypes in Hordeum jubatum based on responses to salinity stress J. P. O’Donnell and R. B. van Huystee Peanut peroxidase and the anionic component Jorge Dubcovsky and Arturo J. Martinez Cytotaxonomy of the Festuca spp. from Patagonia Kimberley A. Ottenbreit and Richard J. Staniforth Life cycle and age structure of ramets in an expanding population of Salix exigua (sandbar willow) W. R. Remphrey and C. G. Davidson Branch architecture and its relation to shoot-tip abortion in mature Fraxinus pennsylvanica Alan Whittick Culture, cytology, and reproductive biology of Callithamnion corymbosum (Rhodophyceae, Ceramiaceae) from a western New- foundland fjord Mireille Desponts and Serge Payette Recent dynamics of jack pine at its northern distribution limit in northern Quebec J. A. Hoes and E. O. Kenaschuk Host—pathogen specificity in postseedling reaction of Linum usitatissimum to Melampsora lini Ravindra G. Bhat, Arthur F. Olah, and August F. Schmitthenner Characterization of universally avirulent strains of Phytophthora sojae R. Gill and Praveen K. Saxena Direct somatic embryogenesis and regeneration of plants from seedling explants of peanut (Arachis hypogaea): promotive role of thidiazuron Robert W. Lichtwardt and Marvin C. Williams Smittium bullatum from a New Zealand midge larva and new records of other trichomycete gut fungi Robert W. Lichtwardt and Marvin C. Williams Furculomyces, a new homothallic genus of Harpellales (Trichomycetes) from Australian midge larvae J. Postma and H. Rattink Biological control of Fusarium wilt of carnation with a nonpathogenic isolate of Fusarium oxysporum M. Menasherov, N. Paster, and R. Nitzan Effects of physical preservation methods on sclerotial germination in Aspergillus flavus and Aspergillus ochraceus in stored grain T. R. Gordon and D. Okamoto Variation within and between populations of Fusarium oxysporum based on vegetative compatibility and mitochondrial DNA Marcelo A. Aizen and Hilary Woodcock Latitudinal trends in acorn size in eastern North American species of Quercus M. T. Misset Meiotic abnormalities during microsporogenesis and low fertility in prostrate ecotypes of Ulex species (Papilionoideae, Genisteae) James P. Braselton Ultrastructural karyology of Spongospora subterranea (Plasmodiophoromycetes) Koji Iwase Induction of basidiospore germination by gluconic acid in the ectomycorrhizal fungus Tricholoma robustum C-4 CAN. J. BOTANY VOL. 70, 1992 E. B. Hariri, B. Jeune, S. Baudino, K. Urech et G. Sallé Elaboration d'un coefficient de résistance au gui chez le chéne Ivano Brunner, Franziska Brunner, and Gary A. Laursen Characterization and comparison of macrofungal communities in an Alnus tenuifolia and an Alnus crispa forest in Alaska Niels Daugbjerg and @jvind Moestrup Ultrastructure of Pyramimonas cyrtoptera sp.nov. (Prasinophyceae), a species with 16 flagella from northern Foxe Basin, Arctic Canada, including observations on growth rates H. O. Kojwang and B. J. van der Kamp Early symptoms and resistance of lodgepole pine seedlings inoculated with western gall rust J. W. Belcher, P. A. Keddy, and P. M. Catling Alvar vegetation in Canada: a multivariate description at two scales Ernest Small and Manal Fawzy Morphogeographic variation in the Medicago monantha complex Karima Mikou et Philippe Badila Induction photopériodique de |’organogenése et de la floraison in vitro chez le Cichorium intybus : aspects histologiques JULY / JUILLET ARTICLES Shuhei Fujii and Johan A. Hellebust Release of intracellular glycerol and pore formation in Dunaliella tertiolecta exposed to hypotonic stress Bohun B. Kinloch, Jr. Distribution and frequency of a gene for resistance to white pine blister rust in natural populations of sugar pine Jon K. Piper Size structure and seed yield over 4 years in an experimental Cassia marilandica (Leguminosae) population Shuhei Fujii and Johan A. Hellebust Effects of Ca?* on the growth of Dunaliella tertiolecta in media with high concentrations of Mg** T. J. Keenan and L. C. Cwynar Late Quaternary history of black spruce and grasslands in southwest Yukon Territory P. Bourgeais-Chaillou, F. Perez-Alfocea et G. Guerrier Evolution ontogénique de la tolérance au NaC! chez la soja : comparaison des réponses au sel & deux stades de développement et chez les cals correspondants Sandra C. Lindstrom and Kathleen M. Cole Relationships between some North Atlantic and North Pacific species of Porphyra (Bangiales, Rhodophyta): evidence from isozymes, morphology, and chromosomes Silvina Garralla and K. Gajewski Holocene vegetation history of the boreal forest near Chibougamau, central Quebec G. Hause, B. Hause, and A. A. M. Van Lammeren_ Microtubular and actin filament configurations during microspore and pollen development in Brassica napus cv. Topas S. Pasqualini, F. Panara, and M. Antonielli Acid phosphatase activity in Pinus pinea — Tuber albidum ectomycorrhizal association M. Jurzysta, S. Burda, W. Oleszek, M. Ploszynski, E. Small, and C. Nozzolillo Chemical composition of seed saponins as a guide to the classification of Medicago species George J. Wilder Orthodistichous phyllotaxy and dorsiventral symmetry on adult shoots of Cyclanthus bipartitus (Cyclanthaceae, Mono- cotyledoneae) P. Halama, A. Parguey-Leduc et L. Lacoste Les organes de reproduction de |’ascomycéte Phaeosphaeria (Leptosphaeria) nodorum et de sa forme asexuée Septoria nodorum C. Neal Stewart, Jr. and Erik T. Nilsen Drosera rotundifolia growth and nutrition in a natural population with special reference to the significance of insectivory Yougi Liu and Nancy G. Dengler Development of open and closed leaf sheaths in Festuca trachyphylla and Festuca rubra (Poaceae) Yousry A. El-Kassaby and Hugh J. Barclay Cost of reproduction in Douglas-fir Norbert Piitz Measurement of the pulling force of a single contractile root O. A. Awadalla and I. M. El-Refai Herbicide-induced resistance of cotton to Verticillium wilt disease and activation of host cells to produce the phytoalexin gossypol Henri Barthou Relations entre organogénése apicale et croissance dimensionnelle de la tige principale du soja (Glycine max) J. L. Julien and J. M. Frachisse Involvement of the proton pump and proton conductance change in the wave of depolarization induced by wounding in Bidens pilosa Zara Afzal-Rafii, Richard S. Dodd, and Yvonne Pelleau Mediterranean evergreen oak diversity: morphological and chemical variation of acorns Klaus B. Tenberge Ultrastructure and development of the outer epidermal wall of spruce (Picea abies) needles Peter Nosko and Kenneth A. Kershaw The influence of pH on the toxicity of a low concentration of aluminum to white spruce seedlings Daryl E. Enstone and Carol A. Peterson A rapid fluorescence technique to probe the permeability of the root apoplast Daryl E. Enstone and Carol A. Peterson The apoplastic permeability of root apices NOTE S. B. Narasimhulu, Shyam Prakash, V. L. Chopra, and V. Arunachalam Comparative shoot regeneration in diploid and amphidiploid Brassica species and their interspecific hybrids CONTENTS/SOMMAIRE AuGusT/AOUT ARTICLES D. M. Rizzo, R. A. Blanchette, and M. A. Palmer Biosorption of metal ions by Armillaria rhizomorphs B. A. D. Hetrick, G. W. T. Wilson, and T. C. Todd Relationships of mycorrhizal symbiosis, rooting strategy, and phenology among tallgrass prairie forbs Antony N. G. Holden and Paul G. Mahlberg Application of chemotaxonomy of leafy spurges (Euphorbia spp.) in biological control Kerstin Huss-Danell, Per-Olof Lundquist, and Helene Ohlsson _N, fixation in a young Alnus incana stand, based on seasonal and diurnal variation in whole plant nitrogenase activity Kerstin Huss-Danell and Helene Ohlsson Distribution of biomass and nitrogen among plant parts and soil nitrogen in a young Alnus incana stand L. V. Gusta, B. Ewan, M. J. T. Reaney, and S. R. Abrams The effect of abscisic acid and abscisic acid metabolites on the germination of cress seed J. M. Ourcival, M. Méthy et R. Burgess Mise en évidence, par la fluorescence de la chlorophylle, de la variabilité génotypique de la réponse a une contrainte hydrique chez le tréfle blanc (Trifolium repens) et l’ivraie vivace (Lolium perenne) P. Halama et L. Lacoste Déterminisme de la reproduction sexuée du Phaeosphaeria (Leptosphaeria) nodorum agent de la septoriose du blé. II. Action de la température et de la lumiére C. H. A. Snijders and C. F. Krechting Inhibition of deoxynivalenol translocation and fungal colonization in Fusarium head blight resistant wheat M. J. Sumner Embryology of Brassica campestris: the entrance and discharge of the pollen tube in the synergid and the formation of the zygote V. A. Berdnikov, V. S. Bogdanova, S. M. Rozov, and F. L. Gorel Territorial distribution of histone H1 alleles in a population of Vicia unijuga formed after urbanization of natural habitat S. P. Bentivenga and B. A. D. Hetrick Seasonal and temperature effects on mycorrhizal activity and dependence of cool- and warm-season tallgrass prairie grasses Doug Brown Estimating the composition of a forest seed bank: a comparison of the seed extraction and seedling emergence methods P. Kainulainen, J. Oksanen, V. Palomaki, J. K. Holopainen, and T. Holopainen Effect of drought and waterlogging stress on needle monoterpenes of Picea abies R. A. Shoemaker and C. E. Babcock Applanodictyosporous Pleosporales: Clathrospora, Comoclathris, Graphyllium, Macrospora, and Platysporoides Stephanie A. Foré, R. James Hickey, John L. Vankat, Sheldon I. Guttman, and Robert L. Schaefer Genetic structure after forest fragmentation: a landscape ecology perspective on Acer saccharum Kirk J. Czymmek and Karen L. Klomparens The ultrastructure of ascosporogenesis in freeze-substituted Thelebolus crustaceus: enveloping membrane system and ascospore initial development Gaku Kudo Effect of snow-free duration on leaf life-span of four alpine plant species Douglas W. White and Edmund W. Stiles Bird dispersal of fruits of species introduced into eastern North America L. M. Reid, D. E. Mather, J. T. Arnason, R. I. Hamilton, and A. T. Bolton Changes in phenolic constituents of maize silk infected with Fusarium graminearum K. W. Cullings and T. D. Bruns Phylogenetic origin of the Monotropoideae inferred from partial 28S ribosomal RNA gene sequences L. Rey, A. Sadik, A. Fer et S. Renaudin Etude de quelques aspects du métabolisme carboné et azoté chez |’Arceuthobium oxycedri, gui nain du genévrier SEPTEMBER / SEPTEMBRE ARTICLES R. J. N. Emery and C. C. Chinnappa Natural hybridization between Stellaria longipes and Stellaria borealis (Caryophyllaceae) Mei-Lee Wu and Richard T. Hanlin Host—parasite relationships between the fungus Leptosphaerulina crassiasca and peanut D. E. Mayhew, A. L. Cook, and T. J. Gulya__ Isolation and characterization of a mycovirus from Plasmopara halstedii Jinliang Li and I. Brent Heath The phylogenetic relationships of the anaerobic chytridiomycetous gut fungi (Neocallimasticaceae) and the Chytri- diomycota. I. Cladistic analysis of rRNA sequences Channarayappa, V. Muniyappa, D. Schwegler-Berry, and G. Shivashankar Ultrastructural changes in tomato infected with tomato leaf curl virus, a whitefly-transmitted geminivirus J. A. Johnson and N. J. Whitney Isolation of fungal endophytes from black spruce (Picea mariana) dormant buds and needles from New Brunswick, Canada Nils Hallenberg and Ellen Larsson Mating biology in Peniophora cinerea (Basidiomycetes) L. P. Ronse Decraene and E. F. Smets An updated interpretation of the androecium of the Fumariaceae O. W. Van Auken, J. K. Bush, and David D. Diamond Changes in species biomass in the Coastal Prairie of Texas when light and nutrients are altered C-8 CAN. J. BOTANY VOL. 70, 1992 David E. Carr The relationship between crop size and fruit removal and its implication for the evolution of dioecy Jun Q. Xia, Fleet N. Lee, and Kyung S. Kim Monoclonal antibodies to an extracellular component of Pyricularia grisea Andrew C. Schuerger and David J. Mitchell Effects of temperature, hydrogen ion concentration, humidity, and light quality on disease caused by Fusarium solani f.sp. phaseoli in mung bean J. Vieth, G. Laublin, C. Morisset et M. Cappadocia Multiplication in vitro de quelques iris 4 partir de racines : aspects histologiques de l‘embryogenése somatique Issei Kobayashi, Yuhko Kobayashi, Naoto Yamaoka, and Hitoshi Kunoh Recognition of a pathogen and a nonpathogen by barley coleoptile cells. III. Responses of microtubules and actin filaments in barley coleoptile cells to penetration attempts Hamed K. Abbas, Rex N. Paul, C. Douglas Boyette, Stephen O. Duke, and Ronald F. Vesonder Physiological and ultrastructural effects of fumonisin on jimsonweed leaves Marc Philippe Un déterminisme architectural pour les bois de coniféres 4 ponctuation mixte (Protopinaceae Kraiisel, 1917)? Loic Pagés Mini-rhizotrons transparents pour |’étude du syst¢me racinaire de jeunes plantes. Application a la caractérisation du développement racinaire de jeunes chénes (Quercus robur) P. E. Lauri Données sur le contexte végétatif lié a la floraison chez le cerisier (Prunus avium) Louisa Squires and A. G. van der Valk Water-depth tolerances of the dominant emergent macrophytes of the Delta Marsh, Manitoba Martin L. Cipollini and Edmund W. Stiles Relative risks of fungal rot for temperate ericaceous fruits: effects of seasonal variation on selection for chemical defense Gina Holguin and Yoav Bashan Increased aggressiveness of Alternaria macrospora, a causal agent of leaf blight in cotton monoculture C. B. Pandey and J. S. Singh Influence of rainfall and grazing on belowground biomass dynamics in a dry tropical savanna Pedro G. Lloret and Antonio Pulgarin Effect of naphthaleneacetic acid on the formation of lateral roots in the adventitious root of Allium cepa: number and arrangement of laterals along the parent root R. Lefebvre, J. Vasseur, E. Backoula et J.-P. Couillerot Participation du métabolisme glucidique 4 |’orientation organogéne de tissus du Cichorium intybus cultivés in vitro Abdellatif Beghdadi, Claude Richard et Daniel Dostaler L’ Aphanomyces euteiches des luzernitres du Québec : isolement, morphologie et variabilité de la croissance et du pouvoir pathogéne NOTES Steven Y. Newell Autumn distribution of marine Pythiaceae across a mangrove —saltmarsh boundary Bodil S¢gaard and Hans Doll A positive allelopathic effect of corn cockle, Agrostemma githago, on wheat, Triticum aestivum OCTOBER / OCTOBRE ARTICLES K. Klinka, Q. Wang, G. J. Kayahara, R. E. Carter, and B. A. Blackwell Light-growth response relationships in Pacific silver fir (Abies amabilis) and subalpine fir (Abies lasiocarpa) M. R. T. Dale, A. G. Thomas, and E. A. John Environmental factors including management practices as correlates of weed community composition in spring seeded crops Susan G. Aiken and George Fedak Cytotaxonomic observations on North American Festuca (Poaceae) Keiko Kitamura and Mohamad Yusof Bin Abdul Rahman _ Genetic diversity among natural populations of Agathis borneensis (Araucari- aceae), a tropical rain forest conifer from Brunei Darussalam, Borneo, Southeast Asia Gary J. Griffin American chestnut survival in understory mesic sites following the chestnut blight pandemic J. Hattori, R. G. Rutledge, B. L. Miki, and B. R. Baum DNA sequence relationships and origins of acetohydroxy acid synthase genes of Brassica napus Brian A. Fineran and Judith M. Fineran Teliospore wall structure in Entorrhiza (Tilletiaceae) and its relationship to taxonomy of the genus Koei Hamana, Shigeru Matsuzaki, Masaru Niitsu, and Keijiro Samejima Distribution of unusual polyamines in leguminous seeds Francoise Van Miegroet et Michel Dujardin Cytologic et histologie de la reproduction chez le Nymphaea heudelotii Walter Nagl The polytenic endosperm haustorium of Rhinanthus minor (Scrophulariaceae): functional ultrastructure Robert Hall and Lana Gay Phillips Effects of crop sequence and rainfall on population dynamics of Fusarium solani f.sp. phaseoli in soil Godo Stoyke, K. N. Egger, and R. S. Currah Characterization of sterile endophytic fungi from the mycorrhizae of subalpine plants Wilma L. Lingle, Ronald P. Clay, and David Porter Ultrastructural analysis of basidiosporogenesis in Panellus stypticus K. C. Nagarathna, Sudheer A. Shetty, H. S. Prakash, S. G. Bhat, and H. Shekara Shetty Lipoxygenase activity in fresh, stored, and germinating pearl millet seeds resistant and susceptible to downy mildew disease B. A. D. Hetrick, G. W. T. Wilson, and T. S. Cox Mycorrhizal dependence of modern wheat varieties, landraces, and ancestors R. Médard, Y. Sell et P. Barnola Le développement du bourgeon axillaire du Manihot esculenta CONTENTS/SOMMAIRE C-9 R. Médard, J. M. N. Walter et P. Barnola Influence, chez le Manihot esculenta, du développement de la lame du limbe sur celui du pétiole et de l’entre-noeud sousjacent 2053 Sandra C. Lindstrom and Kathleen M. Cole A revision of the species of Porphyra (Rhodophyta: Bangiales) occurring in British Columbia and adjacent waters 2066 Fifth International Marine Mycology Symposium A symposium sponsored by the Departments of Botany and Oceanography, The University of British Columbia, Vancouver, B.C. Le cinqui¢me symposium international sur la mycologie marine Un symposium parrainé par les départements de botanique et d’océanographie, The University of British Columbia, Vancouver (Colombie-Britannique) Gilbert C. Hughes Introduction 2079 Lisa K. Muehlstein The host—pathogen interaction in the wasting disease of eelgrass, Zostera marina 2081 Susan J. Stanley Observations on the seasonal occurrence of marine endophytic and parasitic fungi 2089 N. J. W. Clipson and D. H. Jennings Dendryphiella salina and Debaryomyces hansenii: models for ecophysical adaptation to salinity by fungi that grow in the sea 2097 S. Rohrmann, R. Lorenz, and H. P. Molitoris Use of natural and artificial seawater for investigation of growth, fruit body production, and enzyme activities in marine fungi 2106 R. Lorenz and H. P. Molitoris Combined influence of salinity and temperature (Phoma-pattern) on growth of marine fungi 2111 S. Rohrmann and H. P. Molitoris Screening for wood-degrading enzymes in marine fungi 2116 NOVEM/ BNOEVEMRBR E ARTICLES Walter D. Willms and Joanna Fraser Growth characteristics of rough fescue (Festuca scabrella var. campestris) after three years of repeated harvesting at scheduled frequencies and heights Eckhard George, Karl-Uwe Haussler, Doris Vetterlein, Eva Gorgus, and Horst Marschner Water and nutrient translocation by hyphae of Glomus mosseae J. B. Phipps Heteromeles and Photinia (Rosaceae, subfam. Maloideae) of Mexico and Central America D. J. S. Barr and N. L. Désaulniers The flagellar apparatus in zoospores of Phytophthora, Pythium, and Halophytophthora P. W. J. van Wyk and M. J. Wingfield Ascospore development in Ophiostoma piceae Margaret M. Carreiro and R. E. Koske Effect of temperature on decomposition and development of microfungal communities in leaf litter microcosms Channarayappa, G. Shivashankar, V. Muniyappa, and R. H. Frist Resistance of Lycopersicon species to Bemisia tabaci, a tomato leaf curl virus vector 2184 Clinton F. Hodges Pathogenicity of Pythium torulosum to roots of Agrostis palustris in black-layered sand produced by the interaction of the cyanobacteria species Lyngbya, Phormidium, and Nostoc with Desulfovibrio desulfuricans 2193 Anne E. Jackson, Stephen W. Ayer, and Maurice V. Laycock The effect of salinity on growth and amino acid composition in the marine diatom Nitzschia pungens 2198 Walter Litten, John M. Smagula, and Yolande Dalpé Growth of micropropagated lowbush blueberry with defined fungi in irradiated peat mix 2202 René J. Belland, W. B. Schofield, and Terry A. Hedderson Bryophytes of Mingan Archipelago National Park Reserve, Quebec: a boreal flora with arctic and alpine components 2207 S. J. Read, S.-Y. Hsieh, E. B. G. Jones, S. T. Moss, and H. S. Chang Paraliomyces lentiferus: an ultrastructural study of a little-known marine ascomycete 2223 Alban D. Barnabas and Carol A. Peterson Development of Casparian bands and suberin lamellae in the endodermis of onion roots 2233 D. P. Dharmawardhana, B. E. Ellis, and J. E. Carlson Characterization of vascular lignification in Arabidopsis thaliana 2238 Bryan D. McKersie, R. L. Peterson, Stephen R. Bowley, and Shankar Das _ Ultrastructural and genetic characterization of a mutant exhibiting starch accumulation and premature leaf senescence in Medicago sativa 2245 M. I. N. Zhang and J. H. M. Willison Electrical impedance analysis in plant tissues: in vivo detection of freezing injury 2254 Adele Post and Maret Vesk Photosynthesis, pigments, and chloroplast ultrastructure of an Antarctic liverwort from sun-exposed and shaded sites 2259 Zhijun Liu and Donald I. Dickmann Responses of two hybrid Populus clones to flooding, drought, and nitrogen availability. 1. Morphology and growth 2265 Christian Messier Effects of neutral shade and growing media on growth, biomass allocation, and competitive ability of Gaultheria shallon 2271 D. F. Greene and E. A. Johnson = Fruit abscission in Acer saccharinum with reference to seed dispersal 2277 c-10 CAN. J. BOTANY VOL. 70, 1992 G. Cambon, J. C. Ritchie et P. Guinet Pollen marqueur de transports 4 longue distance dans |’atmosphére du sud de |’Ontario (Canada) Jacques Tardif et Yves Bergeron Analyse écologique des peuplements de fréne noir (Fraxinus nigra) des rives du lac Duparquet, nord-ouest du Québec S. 1. Warwick, B. K. Thompson, and L. D. Black Hybridization of Carduus nutans and Carduus acanthoides (Compositae): morphological variation in F, hybrids and backcrosses NOTE Shiro Tsuyuzaki and Tatsuichi Tsujii Size and shape of Carex meyeriana tussocks in an alpine wetland, northern Sichuan Province, China COMMENTARIES / COMMENTAIRES J. G. Chmielewski and C. C. Chinnappa Commentary on Bayer’s use of incomplete data matrices and weighted qualitative characters in phenetic studies of North American Antennaria: Commentary Randall J. Bayer Some observations on morphometric analyses of Antennaria (Asteraceae: Inuleae): Reply DECEMBER / DECEMBRE ARTICLES Mark D. Lazzaro and William W. Thomson Ultrastructural localization of calcium in the organic acid secreting trichomes of chickpea (Cicer arietinum) Jacques Rembur, Arlette Nougaréde, Pierre Rondet, and Dennis Francis Floral-specific polypeptides in Silene coeli-rosa E. G. Reekie and P. Wayne Leaf canopy display, stomatal conductance, and photosynthesis in seedlings of three tropical pioneer tree species subjected to drought Melanie C. Trull, Brian L. Holaway, and Russell L. Malmberg Development of stigmatoid anthers in a tobacco mutant: implications for regulation of stigma differentiation G. A. O’ Neill, C. P. Chanway, P. E. Axelrood, R. A. Radley, and F. B. Holl An assessment of spruce growth response specificity after inoculation with coexistent rhizosphere bacteria Carol C. Baskin, Jerry M. Baskin, and O. W. Van Auken Germination response patterns to temperature during afterripening of achenes of four Texas winter annual Asteraceae Paul F. Maycock and Dianne Fahselt Vegetation of stressed calcareous screes and slopes in Sverdrup Pass, Ellesmere Island, Canada Mary V. Santelmann Cellulose mass loss in ombrotrophic bogs of northeastern North America George J. Wilder and Jeffrey R. Johansen Comparative anatomy of absorbing roots and anchoring roots in three species of Cyclanthaceae (Monocotyledoneae) J. H. C. Cornelissen Seasonal and year to year variation in performance of Gordonia acuminata seedlings in different light environments S. J. Darbyshire and S. 1. Warwick Phylogeny of North American Festuca (Poaceae) and related genera using chloroplast DNA restriction site Variation Maria Eliana Ramirez and Akira F. Peters The South American species of Desmarestia (Phaeophyceae) Francis I. Molina, Peng Shen, Shung-Chang Jong, and Kazuhiko Orikono Molecular evidence supports the separation of Lentinula edodes from Lentinus and related genera Zohra Fortas et Gérard Chevalier Effet des conditions de culture sur la mycorhization de |'Helianthemum guttatum par trois espéces de terfez des genres Terfezia et Tirmania d Algérie Michéle C. Heath Host species specificity of the goldenrod rust fungus and the existence of rust resistance within some goldenrod species Kevin E. Gedge and M. A. Maun Effects of simulated herbivory on growth and reproduction of two beach annuals, Cakile edentula and Corispermum hyssopifolium Terri A. Suttill and Geraldine A. Allen Morphological and chromosomal variation in Dodecatheon pulchellum (Primulaceae) Amanda L. Siegfried, Keith A. Seifert, and Barton C. Bilmer A new species of Phialocephala (Hyphomycetes) Bruce K. Kirchoff Ovary structure and anatomy in the Heliconiaceae and Musaceae (Zingiberales) NOTES Robert A. Tisdale and T. Evan Nebeker Resin flow as a function of height along the bole of loblolly pine Charles E. Umbanhowar, Jr. Erratum: Abundance, vegetation, and environment of four patch types in a northern mixed prairie Note of appreciation / Note de reconnaissance Author index for Volume 70 / Index des auteurs pour le volume 70 Subject index for Volume 70 / Index des matiéres pour le volume 70 Contents for Volume 70 / Sommaire pour le volume 70

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