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Revue canadienne de botanique Contents Volume 77, 1999 Sommaire Volume 77, 1999 January / janvier ARTICLES Sigurd M. Såstad Genetic and environmental sources of variation in leaf morphology of Sphagnum fallax and Sphagnum isoviitae (Bryopsida): comparison of experiments conducted in the field and laboratory 1 Ursula Eberhardt, Lutz Walter, and Ingrid Kottke Molecular and morphological discrimination between Tylospora fibrillosa and Tylospora asterophora mycorrhizae 11 Masahiro Shishido and Christopher P. Chanway Spruce growth response specificity after treatment with plant growth-promoting Pseudomonads 22 Adya P. Singh and Lloyd A. Donaldson Ultrastructure of tracheid cell walls in radiata pine (Pinus radiata) mild compression wood 32 Lloyd A. Donaldson, Adya P. Singh, Arata Yoshinaga, and Keiji Takabe Lignin distribution in mild compression wood of Pinus radiata 41 Montserrat Torrell, Maria Bosch, Joan Martín, and Joan Vallès Cytogenetic and isozymic characterization of the narrow en- demic species Artemisia molinieri (Asteraceae, Anthemideae): implications for its systematics and conservation 51 Luc Sirois, Yves Bégin, and Johanne Parent Female gametophyte and embryo development of black spruce along a shore– hinterland climatic gradient of a recently created reservoir, northern Quebec 61 Isabel Santos, José Almeida, and Roberto Salema The influence of UV-B radiation on the superoxide dismutase of maize, po- tato, sorghum, and wheat leaves 70 Hafedh Nasr, Tahar Sghaier, Mohamed Habib Ghorbal et Yvon René Dommergues Variabilité génotypique de l’aptitude à la fixation symbiotique de l’azote chez Acacia cyanophylla Lindl. 77 Payam M. Fallah, J. Leland Crane, and Carol A. Shearer Freshwater ascomycetes: two new species of Ascotaiwania from North America 87 Thomas R. Horton, Thomas D. Bruns, and V. Thomas Parker Ectomycorrhizal fungi associated with Arctostaphylos contrib- ute to Pseudotsuga menziesii establishment 93 Rhomela F. Masangkay, Maxima O. Mabbayad, Timothy C. Paulitz, and Alan K. Watson Host range of Alternaria alter- nata f.sp. sphenocleae causing leaf blight of Sphenoclea zeylanica 103 James L. Seago, Jr., Carol A. Peterson, and Daryl E. Enstone Cortical ontogeny in roots of the aquatic plant, Hydrocharis morsus-ranae L. 113 James L. Seago, Jr., Carol A. Peterson, Daryl E. Enstone, and Chris A. Scholey Development of the endodermis and hypo- dermis of Typha glauca Godr. and Typha angustifolia L. roots 122 M. Habte, Y.C. Zhang, and D.P. Schmitt Effectiveness of Glomus species in protecting white clover against nematode damage 135 David E. Giblin and Clement W. Hamilton The relationship of reproductive biology to the rarity of endemic Aster curtus (Asteraceae) 140 Gregory S. Saenz and John W. Taylor Phylogeny of the Erysiphales (powdery mildews) inferred from internal transcribed spacer ribosomal DNA sequences 150 NOTES Chantal Morin, Julie Samson, and Michel Dessureault Protection of black spruce seedlings against Cylindrocladium root rot with ectomycorrhizal fungi 169 H. Krüger, A. Viljoen, and P.S. Van Wyk Histopathology of Albugo tragopogonis on stems and petioles of sunflower 175 Jon H. Connolly, Walter C. Shortle, and Jody Jellison Translocation and incorporation of strontium carbonate derived stron- tium into calcium oxalate crystals by the wood decay fungus Resinicium bicolor 179 C-1

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Page 1: Contents Volume 77, 1999

Revue canadiennede botanique

ContentsVolume 77, 1999

SommaireVolume 77, 1999

January / janvier

ARTICLES

Sigurd M. Såstad Genetic and environmental sources of variation in leaf morphology ofSphagnum fallaxandSphagnum isoviitae(Bryopsida): comparison of experiments conducted in the field and laboratory 1

Ursula Eberhardt, Lutz Walter, and Ingrid Kottke Molecular and morphological discrimination betweenTylospora fibrillosaand Tylospora asterophoramycorrhizae 11

Masahiro Shishido and Christopher P. Chanway Spruce growth response specificity after treatment with plant growth-promotingPseudomonads 22

Adya P. Singh and Lloyd A. Donaldson Ultrastructure of tracheid cell walls in radiata pine (Pinus radiata) mild compressionwood 32

Lloyd A. Donaldson, Adya P. Singh, Arata Yoshinaga, and Keiji Takabe Lignin distribution in mild compression wood ofPinus radiata 41

Montserrat Torrell, Maria Bosch, Joan Martín, and Joan Vallès Cytogenetic and isozymic characterization of the narrow en-demic speciesArtemisia molinieri(Asteraceae, Anthemideae): implications for its systematics and conservation 51

Luc Sirois, Yves Bégin, and Johanne Parent Female gametophyte and embryo development of black spruce along a shore–hinterland climatic gradient of a recently created reservoir, northern Quebec 61

Isabel Santos, José Almeida, and Roberto SalemaThe influence of UV-B radiation on the superoxide dismutase of maize, po-tato, sorghum, and wheat leaves 70

Hafedh Nasr, Tahar Sghaier, Mohamed Habib Ghorbal et Yvon René Dommergues Variabilité génotypique de l’aptitude àla fixation symbiotique de l’azote chezAcacia cyanophyllaLindl. 77

Payam M. Fallah, J. Leland Crane, and Carol A. Shearer Freshwater ascomycetes: two new species ofAscotaiwaniafromNorth America 87

Thomas R. Horton, Thomas D. Bruns, and V. Thomas Parker Ectomycorrhizal fungi associated withArctostaphyloscontrib-ute to Pseudotsuga menziesiiestablishment 93

Rhomela F. Masangkay, Maxima O. Mabbayad, Timothy C. Paulitz, and Alan K. Watson Host range ofAlternaria alter-nata f.sp. sphenocleaecausing leaf blight ofSphenoclea zeylanica 103

James L. Seago, Jr., Carol A. Peterson, and Daryl E. Enstone Cortical ontogeny in roots of the aquatic plant,Hydrocharismorsus-ranaeL. 113

James L. Seago, Jr., Carol A. Peterson, Daryl E. Enstone, and Chris A. ScholeyDevelopment of the endodermis and hypo-dermis ofTypha glaucaGodr. andTypha angustifoliaL. roots 122

M. Habte, Y.C. Zhang, and D.P. Schmitt Effectiveness ofGlomusspecies in protecting white clover against nematode damage135

David E. Giblin and Clement W. Hamilton The relationship of reproductive biology to the rarity of endemicAster curtus(Asteraceae) 140

Gregory S. Saenz and John W. Taylor Phylogeny of the Erysiphales (powdery mildews) inferred from internal transcribedspacer ribosomal DNA sequences 150

NOTES

Chantal Morin, Julie Samson, and Michel Dessureault Protection of black spruce seedlings against Cylindrocladium root rotwith ectomycorrhizal fungi 169

H. Krüger, A. Viljoen, and P.S. Van Wyk Histopathology ofAlbugo tragopogonison stems and petioles of sunflower 175

Jon H. Connolly, Walter C. Shortle, and Jody Jellison Translocation and incorporation of strontium carbonate derived stron-tium into calcium oxalate crystals by the wood decay fungusResinicium bicolor 179

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Instructions to authors I-1

Recommandations aux auteurs R-1

February / février

ARTICLES

Georges Barale Sur la présence d’une nouvelle espèce d’Isoetitesdans la flore du Crétacé inférieur de la région de Tataouine (Sudtunisien) : implications paléoclimatiques et phylogénétiques 189

Norio Sahashi, Takanori Kubono, Yukiko Miyasawa, and Shin’ichiro Ito Temporal variations in isolation frequency of endo-phytic fungi of Japanese beech 197

Héctor Godínez-Alvarez, Alfonso Valiente-Banuet, and Leopoldo Valiente Banuet Biotic interactions and the population dy-namics of the long-lived columnar cactusNeobuxbaumia tetetzoin the Tehuacán Valley, Mexico 203

Mei-Rong Li, David A. Wedin, and Larry L. Tieszen C3 and C4 photosynthesis inCyperus(Cyperaceae) in temperate easternNorth America 209

Teresa Valverde and Irene Pisanty Growth and vegetative spread ofSchizachyrium scopariumvar. littoralis (Poaceae) in sanddune microhabitats along a successional gradient 219

Raffaela Vicaretti and Paul B.M. Joyce Comparison of mitochondrial and cytosolic tRNA nucleotidyltransferases fromTriticumaestivum 230

Bilquees Gul and Darrell J. Weber Effect of salinity, light, and temperature on germination inAllenrolfea occidentalis 240

R. Kirschner and F. Oberwinkler A new Ophiostomaspecies associated with bark beetles infesting Norway spruce 247

J.P. André, A.M. Catesson, and M. Liberman Characters and origin of vessels with heterogenous structure in leaf and flowerabscission zones 253

Michael J. Sumner, William R. Remphrey, and Richard Martin Pollen development in relation to phenological stages of in-florescence expansion inAmelanchier alnifolia(saskatoon), with a comparison with buds forced out of dormancy 262

Mark Vellend and Marcia J. Waterway Geographic patterns in the genetic diversity of a northern sedge,Carex rariflora 269

Coralie R. Sopher, Marianna Król, Norman P.A. Huner, Andrew E. Moore, and R. Austin Fletcher Chloroplastic changesassociated with paclobutrazol-induced stress protection in maize seedlings 279

Barbara S. Dyck and Jennifer M. Shay Biomass and carbon pool of two bogs in the Experimental Lakes Area, northwesternOntario 291

J.S. Yates, J.L. Golden, and J.F. Bain A preliminary phytogeographical analysis of inter- and intra-populational chloroplastDNA variation in Packera pseudaurea(Asteraceae: Senecioneae) from southwestern Alberta and adjacent Montana 305

C. Wu and T. Hsiang Mycelial growth, sclerotial production and carbon utilization of threeTyphulaspecies 312

Jacintha Miranda, Michele N. Konschuh, E.C. Yeung, and C.C. Chinnappa In vitro plantlet regeneration from hypocotyl ex-plants ofStellaria longipes(Caryophyllaceae) 318

March / mars

ARTICLES

Suzy Y. Rogiers and N. Richard Knowles A comparison of preharvest and postharvest ethylene production and respiration ratesof saskatoon (Amelanchier alnifoliaNutt.) fruit during development 323

J.A. Kolmer Virulence dynamics, phenotypic diversity, and virulence complexity in two populations ofPuccinia triticina in Can-ada from 1987 to 1997 333

S. Moricca, A. Ragazzi, and K.R. Mitchelson Molecular and conventional detection and identification ofCladosporium tenuis-simumon two-needle pine rust aeciospores 339

L.P.R. Bidel, M.R. Mannino, L.M. Rivière, and L. Pagès Tracing root development using the soft X-ray radiographic method,as applied to young cuttings of western red cedar (Thuja plicata) 348

Gabriela S. Wyss and Heinz Müller-Schärer Infection process and resistance in the weed pathosystemSenecio vulgaris–Puccinia lagenophoraeand implications for biological control 361

Heather R. Kleb and Scott D. Wilson Scales of heterogeneity in prairie and forest 370

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T. Dutoit, P. Roche et D. Alard Influence de perturbations anthropiques sur la composition et la diversité botanique des pelousescalcicoles de la vallée de la Seine en Haute-Normandie (France) 377

Jin-Feng Chen, Jack E. Staub, Jeffrey W. Adelberg, and Jiming Jiang Physical mapping of 45S rRNA genes inCucumisspecies by fluorescence in situ hybridization 389

Peter A. Wilson, James S. Hanan, Peter M. Room, Sukumar Chakraborty, and David Doley Using Lindenmayer systems tomodel morphogenesis in a tropical pasture legumeStylosanthes scabra 394

A. Herrera Effects of photoperiod and drought on the induction of crassulacean acid metabolism and the reproduction of plants ofTalinum triangulare 404

Giuseppe Bagatto and Joseph D. ShorthouseBiotic and abiotic characteristics of ecosystems on acid metalliferous mine tail-ings near Sudbury, Ontario 410

Jerry G. Chmielewski Consequences of achene biomass, within-achene allocation patterns, and pappus on germination in ray anddisc achenes ofAster umbellatusvar. umbellatus(Asteraceae) 426

John H. Markham and Chris P. Chanway Does past contact reduce the degree of mutualism in theAlnus rubra – Frankiasymbiosis? 434

A. Ignatov, Y. Kuginuki, and K. Hida Vascular stem resistance to black rot inBrassica oleracea 442

Élisabeth Claire Robert, Line Rochefort, and Michelle Garneau Natural revegetation of two block-cut mined peatlands ineastern Canada 447

Odette Rohfritsch A so called “rudimentary gall” induced by the gall midgePhysemocecis hartigion leaves ofTilia intermedia 460

April / avril

REVIEW / SYNTHÈSE

Patricia A. Chambers, Robert E. DeWreede, Elizabeth A. Irlandi, and Herbert Vandermeulen Management issues in aquaticmacrophyte ecology: a Canadian perspective 471

ARTICLES

Carol C. Baskin, Jerry M. Baskin, and Edward W. Chester Seed dormancy and germination inRhexia marianavar. interior(Melastomataceae) and eco-evolutionary implications 488

M.E. Galway, D.C. Lane, and J.W. Schiefelbein Defective control of growth rate and cell diameter in tip-growing root hairs ofthe rhd4 mutant ofArabidopsis thaliana 494

Eric Imbert The effects of achene dimorphism on the dispersal in time and space inCrepis sancta(Asteraceae) 508

Colin M. Orians, Daniel I. Bolnick, Bernadette M. Roche, Robert S. Fritz, and Ted Floyd Water availability alters the rela-tive performance ofSalix sericea, Salix eriocephala, and their F1 hybrids 514

Susanna Puustinen and Veikko Salonen The effect of host defoliation on hemiparasitic–host interactions betweenRhinanthusserotinusand twoPoa species 523

Patrick von Aderkas and Cathy Leary Ovular secretions in the micropylar canal of larches (Larix kaempferiand L. × euro-lepis) 531

Carol L. Ecale Zhou and Elaine A. Backus Phloem injury and repair following potato leafhopper feeding on alfalfa stems 537

B. Bucciarelli, M.E. Ostry, R.G. Fulcher, N.A. Anderson, and C.P. Vance Histochemical and microspectrophotometric analy-ses of early wound responses of resistant and susceptiblePopulus tremuloidesinoculated withEntoleuca mammata(;Hypoxylonmammatum) 548

Liza Peeters and Ørjan Totland Wind to insect pollination ratios and floral traits in five alpineSalix species 556

Jennifer A. Wilson and Darwyn S. Coxson Carbon flux in a subalpine spruce–fir forest: pulse release fromHylocomium splen-densfeather-moss mats 564

W. Wyatt Oswald, Linda B. Brubaker, and Patricia M. Anderson Late Quaternary vegetational history of the Howard Passarea, northwestern Alaska 570

L.P. Ronse Decraene and E.F. SmetsThe floral development and anatomy ofCarica papaya(Caricaceae) 582

Jeffrey S. Carmichael and Sarena M. Selbo Ovule, embryo sac, embryo, and endosperm development in leafy spurge (Eu-phorbia esula) 599

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May / mai

ARTICLES

Philip J. Villani and Darleen A. DeMason Roles of theAf andTl genes in pea leaf morphogenesis: leaf morphology and pinnaanatomy of the heterozygotes 611

L.C. Bliss and W.G. Gold Vascular plant reproduction, establishment, and growth and the effects of cryptogamic crusts within apolar desert ecosystem, Devon Island, N.W.T., Canada 623

Stephan Imhof Subterranean structures and mycorrhiza of the achlorophyllousBurmannia tenella(Burmanniaceae) 637

G.B. Ouellette, R.P. Baayen, M. Simard, and D. Rioux Ultrastructural and cytochemical study of colonization of xylem vesselelements of susceptible and resistantDianthus caryophyllusby Fusarium oxysporumf.sp. dianthi 644

Christian Bégin and Louise Filion Black spruce (Picea marianna) architecture 664

Joëlle Coulaud, Nasrine Barghi, Claude Lefèbvre, and Sonja Siljak-Yakovlev Cytogenetic variation in populations ofArme-ria maritima (Mill.) Willd. in relation to geographical distribution and soil stress tolerances 673

J.P. Kociolek and J.C. Kingston Taxonomy, ultrastructure, and distribution of some gomphonemoid diatoms (Bacillariophyceae:Gomphonemataceae) from rivers in the United States 686

Iris Meusel, Christoph Neinhuis, Claus Markstädter, and Wilhelm Barthlott Ultrastructure, chemical composition, and re-crystallization of epicuticular waxes: transversely ridged rodlets 706

Philip Camill Patterns of boreal permafrost peatland vegetation across environmental gradients sensitive to climate warming721

Marc Santandreu and Francisco Lloret Effect of flowering phenology and habitat on pollen limitation inErica multiflora 734

Danielle Lobreau-Callen, Joël Jérémie et Maria Suarez-Cervera Morphologie et ultrastructure du pollen dans le genreUtri -cularia L. (Lentibulariaceae) 744

ERRATA

James L. Seago, Jr., Carol A. Peterson, and Daryl E. Enstone Erratum: Cortical ontogeny in roots of the aquatic plant,Hydrocharis morus-ranaeL. 768

Masahiro Shishido and Christopher P. Chanway Erratum: Spruce growth response specificity after treatment with plantgrowth-promoting Pseudomonads 770

June / juin

ARTICLES

James W. Baxter, Steward T.A. Pickett, Margaret M. Carreiro, and John Dighton Ectomycorrhizal diversity and communitystructure in oak forest stands exposed to contrasting anthropogenic impacts 771

Glenn R. Furnier, Allison M. Stolz, Raka M. Mustaphi, and Michael E. Ostry Genetic evidence that butternut canker wasrecently introduced into North America 783

Gregory B. Allen, Kendrick J. Brown, and Richard J. Hebda Surface pollen spectra from southern Vancouver Island, BritishColumbia, Canada 786

Abul Kalam Mohammed Ekramoddoullah, Yingchun Tan, Xueshu Yu, Doug William Taylor, and Santosh Misra Identifi-cation of a protein secreted by the blister rust fungusCronartium ribicola in infected white pines and its cDNA cloning and char-acterization 800

Tomás Rodríguez-Riaño, Ana Ortega-Olivencia, and Juan A. DevesaReproductive biology in two Genisteae (Papilionoideae)endemic of the western Mediterranean region:Cytisus striatusand Retama sphaerocarpa 809

René Le Cohu Révision des principales espèces de Fragilariales (Bacillariophyta) des îles Kerguelen 821

Pere Navarro-Rosinés, Claude Roux et André Bellemère Thelocarpella gordensisgen. et sp. nov. (Ascomycetes lichenisati,Acarosporaceae) 835

Bradley R. Kropp, Gary R. Hooper, Dane R. Hansen, Mike Binns, and Sherman V. Thomson Initial events in the coloniza-tion of dyer’s woad byPuccinia thlaspeos 843

Beom Seok Kim, Surk Sik Moon, and Byung Kook Hwang Isolation, identification, and antifungal activity of a macrolide an-tibiotic, oligomycin A, produced byStreptomyces libani 850

Claude Lavoie and Annie Saint-Louis The spread of gray birch (Betula populifolia) in eastern Quebec: landscape and historicalconsiderations 859

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Jon Moen, Pär K. Ingvarsson, and David W.H. Walton Estimates of structural complexity in clonal plant morphology: com-parisons of grazed and ungrazedAcaena magellanicarhizomes 869

Santiago Ortiz Three new scapose species ofVernoniaSchreb. (Asteraceae, Vernonieae) from Angola 877

A.M. Farnet, M. Roux, and J. Le Petit Genotypic variations among isolates ofMarasmius quercophilus, a white-rot fungus iso-lated from evergreen oak litter 884

Alexandra Pinior, Urs Wyss, Yves Piché, and Horst Vierheilig Plants colonized by AM fungi regulate further root coloniza-tion by AM fungi through altered root exudation 891

Leonard J. Hutchison Wood-inhabiting microfungi isolated fromPopulus tremuloidesfrom Alberta and northeastern British Co-lumbia 898

Monica Marcinko Kuehn and Bradley N. White Morphological analysis of genetically identified cattailsTypha latifolia,Typha angustifolia, andTypha ×glauca 906

July / juillet

DISCUSSION

Kevin P. Timoney Threatened dry grasslands in the continental boreal forests of Wood Buffalo National Park: commentary913

A.G. Schwarz and Ross W. Wein Dry grasslands in Wood Buffalo National Park: reply 918

ARTICLES

Charles B. Halpern, Shelley A. Evans, and Sarah Nielson Soil seed banks in young, closed-canopy forests of the OlympicPeninsula, Washington: potential contributions to understory reinitiation 922

Ann L. Lezberg, Joseph A. Antos, and Charles B. Halpern Belowground traits of herbaceous species in young coniferous for-ests of the Olympic Peninsula, Washington 936

Nobuharu Goto and Richard P. Pharis Role of gibberellins in the development of floral organs of the gibberellin-deficient mu-tant, ga1-1, ofArabidopsis thaliana 944

Alexander Lux, Miroslava Luxová, Shigenori Morita, Jun Abe, and Shinobu Inanaga Endodermal silicification in develop-ing seminal roots of lowland and upland cultivars of rice (Oryza sativaL.) 955

Oussama Ahrazem, Begoña Gómez-Miranda, Alicia Prieto, Isabel Barasoaín, Manuel Bernabé, and J. Antonio LealStruc-tural characterization of a cell wall polysaccharide fromPenicillium vermoesenii: chemotaxonomic application 961

Massimiliano Tattini and Riccardo Gucci Ionic relations ofPhillyrea latifolia L. plants during NaCl stress and relief fromstress 969

Xiaojie Li, Jerry M. Baskin, and Carol C. Baskin Contrasting dispersal phenologies in two fleshy-fruited congeneric shrubs,Rhus aromaticaAit. and Rhus glabraL. (Anacardiaceae) 976

B. Foggi, G. Rossi, and M.A. Signorini The Festuca violaceaaggregate (Poaceae) in the Alps and Apennines (central southernEurope) 989

John Paul Schmit, John F. Murphy, and Gregory M. Mueller Macrofungal diversity of a temperate oak forest: a test of spe-cies richness estimators 1014

T.P. McGonigle, J.P. Hovius, and R.L. Peterson Arbuscular mycorrhizae of American ginseng (Panax quinquefolius) in culti-vated field plots: plant age affects the development of a colonization lag phase 1028

Rong-Cai Yang, Zhihong Ye, and Yasu Hiratsuka Susceptibility ofPinus contorta – Pinus banksianacomplex toEndocronar-tium harknessii: host–pathogen interactions 1035

F. Jailloux, L. Willocquet, L. Chapuis, and G. Froidefond Effect of weather factors on the release of ascospores ofUncinulanecator, the cause of grape powdery mildew, in the Bordeaux region 1044

August / août

ARTICLES

H.B. Massicotte, R. Molina, L.E. Tackaberry, J.E. Smith, and M.P. Amaranthus Diversity and host specificity of ectomycor-rhizal fungi retrieved from three adjacent forest sites by five host species 1053

Peter Lesica and Scott Miles Russian olive invasion into cottonwood forests along a regulated river in north-central Montana1077

Lori A. Gom and Stewart B. Rood The discrimination of cottonwood clones in a mature grove along the Oldman River insouthern Alberta 1084

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Lori A. Gom and Stewart B. Rood Patterns of clonal occurrence in a mature cottonwood grove along the Oldman River, Alberta1095

Bohumil Mandák and Petr Pyšek How does density and nutrient stress affect allometry and fruit production in the heterocarpicspeciesAtriplex sagittata(Chenopodiaceae)? 1106

Stephen R. Downie and Deborah S. Katz-Downie Phylogenetic analysis of chloroplastrps16 intron sequences reveals relation-ships within the woody southern African Apiaceae subfamily Apioideae 1120

André-Jean Francez et Pierre Loiseau Devenir de l’azote minéral dans une tourbière àSphagnum fallaxKlinggr. et Carexrostrata Stokes du Massif central (France) 1136

Paul M. Catling and Vivian R. Brownell Platanthera lacera× leucophaea, a new cryptic natural hybrid, and a key to northeast-ern North American fringed-orchids 1144

R.D. Wulff, H.F. Causin, O. Benitez, and P.A. Bacalini Intraspecific variability and maternal effects in the response to nutrientaddition in Chenopodium album 1150

Yoh-ichi Matsubara, Yukari Uetake, and R. Larry Peterson Entry and colonization ofAsparagus officinalisroots by arbus-cular mycorrhizal fungi with emphasis on changes in host microtubules 1159

L. Lardet, G. Piombo, F. Oriol, E. Dechamp, and M.P. Carron Relations between biochemical characteristics and conversionability in Hevea brasiliensiszygotic and somatic embryos 1168

Ming-Qiu Yu and Wen-Hsiung Ko The inheritance of mating type and growth rate inChoanephora cucurbitarum 1178

NOTES

E.A. Johnson, K. Miyanishi, and N. O’Brien Long-term reconstruction of the fire season in the mixedwood boreal forest ofWestern Canada 1185

C. Gurusamy The pattern of seed formation in cauliflower (Brassica oleraceaL. var. botrytis) with special reference to seed abor-tion 1189

J.M. Kranabetter, S. Hayden, and E.F. Wright A comparison of ectomycorrhiza communities from three conifer speciesplanted on forest gap edges 1193

J. Mitchell McGrath and Leslie G. Hickok Multiple ribosomal RNA gene loci in the genome of the homosporous fernCera-topteris richardii 1199

September / septembre

THE 11TH INTERNATIONAL CONFERENCE ON FRANKIA AND ACTINORHIZAL PLANTS /[11e CONFÉRENCE INTERNATIONALE SUR LES FRANKIA ET LES PLANTES ACTINORHIZIENNES]

University of Illinois at Urbana–Champaign, Illinois, U.S.A., June 7–11, 1998 /University of Illinois at Urbana–Champaign, Illinois, U.S.A., 7–11 juin 1998

J.O. Dawson Foreword / Préambule v

ARTICLES

Michael L. Clawson, Jeffrey Gawronski, and David R. Benson Dominance ofFrankia strains in stands ofAlnus incanasubsp.rugosaand Myrica pensylvanica 1203

Nancy J. Ritchie and David D. Myrold Phylogenetic placement of unculturedCeanothusmicrosymbionts using 16S rRNA genesequences 1208

Néstor-Octavio Pérez, Hiram Olivera, Luis Vásquez, and María Valdés Genetic characterization of MexicanFrankia strainsnodulatingCasuarina equisetifolia 1214

Soon-Chun Jeong and David D. Myrold Genomic fingerprinting ofFrankia microsymbionts fromCeanothuscopopulations us-ing repetitive sequences and polymerase chain reactions 1220

Anja Nickel, Dittmar Hahn, Kornelia Zepp, and Josef Zeyer In situ analysis of introducedFrankia populations in root nod-ules of Alnus glutinosagrown under different water availability 1231

R. Nalin, P. Normand, P. Simonet, and A.M. Domenach Polymerase chain reaction and hybridization on DNA extracted fromsoil as a tool forFrankia spp. population distribution studies in soil 1239

J.F. Zimpfer, G.J. Kennedy, C.A. Smyth, J. Hamelin, E. Navarro, and J.O. Dawson Localization ofCasuarina-infective FrankianearCasuarina cunninghamianatrees in Jamaica 1248

Louis S. Tisa, Matthew S. Chval, Glenn D. Krumholz, and Joel Richards Antibiotic resistance patterns ofFrankia strains 1257

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Erica Lumini and Marco Bosco Polymerase chain reaction – restriction fragment length polymorphisms for assessing and in-creasing biodiversity ofFrankia culture collections 1261

Ho Bang Kim and Chung Sun An Isolation and characterization of a cDNA clone encoding polyubiquitin from the root noduleof Elaeagnus umbellata 1270

Won Young Yoo, Si Bum Sung, and Chung Sun An Nucleotide sequences of the 2-oxoacid ferredoxin oxidoreductase andferredoxin genes fromFrankia strain EuIK1, a symbiont ofElaeagnus umbellataroot nodules 1279

Neil R. McEwan and Derek Gatherer Codon indices as a predictor of gene functionality in aFrankia operon 1287

Hélène Cérémonie, Frédéric Debellé, and Maria P. Fernandez Structural and functional comparison ofFrankia root hair de-forming factor and rhizobia Nod factor 1293

Claudio Valverde and Luis Gabriel Wall Regulation of nodulation inDiscaria trinervis (Rhamnaceae) –Frankia symbiosis 1302

M. Hughes, C. Donnelly, A. Crozier, and C.T. Wheeler Effects of the exposure of roots ofAlnus glutinosa to light onflavonoids and nodulation 1311

Gregory L. Boyer, Stacie A. Kane, Jeffrey A. Alexander, and Dallas B. Aronson Siderophore formation in iron-limited cul-tures ofFrankia sp. strain 52065 andFrankia sp. strain CeSI5 1316

J.M. Igual and J.O. Dawson Stimulatory effects of aluminum on in vitro growth ofFrankia 1321

R. Howard Berg Frankia forms infection threads 1327

R. Howard Berg, Birgit Langenstein, and Warwick B. Silvester Development in theDatisca–Coriarianodule type 1334

R. Howard Berg Cytoplasmic bridge formation in the nodule apex of actinorhizal root nodules 1351

Warwick B. Silvester, Birgit Langenstein, and R. Howard Berg Do mitochondria provide the oxygen diffusion barrier in rootnodules ofCoriaria and Datisca? 1358

John D. Tjepkema, Gangyi Du, and Christa R. Schwintzer Response of respiration and nitrogenase activity inDatiscaglomerata(Presl.) Baill. to changes in pO2 1367

Janet McCray Batzli and Jeffrey O. Dawson Development of flood-induced lenticels in red alder nodules prior to the restora-tion of nitrogenase activity 1373

Melissa A. Dow and Christa R. Schwintzer Seed germination, seedling emergence, and seed bank ecology of sweet fern(Comptonia peregrina(L.) Coult.) 1378

Vinton Thompson Spittlebugs associated with actinorhizal host plants 1387

Genevieve Louise Mark, John E. Hooker, Alexander Hahn, and Chris T. Wheeler In vitro culture of arbuscular mycorrhizalfungus andFrankia for inoculation of micropropagatedCasuarina equisetifoliaL. 1391

Poo Chow, Gary L. Rolfe, and Dilpreet S. Bajwa Stem chemical compositions of juvenileElaeagnusand Alnus species 1398

October / octobre

ARTICLES

Ruben L. Boles, Jon Lovett-Doust, and Lesley Lovett-Doust Population genetic structure in green dragon (Arisaema dracon-tium, Araceae) 1401

Ewald Weber and Carla M. D’Antonio Phenotypic plasticity in hybridizingCarpobrotusspp. (Aizoaceae) from coastal Califor-nia and its role in plant invasion 1411

Inderjit, Chikako Asakawa, and K.M.M. Dakshini Allelopathic potential ofVerbesina encelioidesroot leachate in soil 1419

V. Heraut-Bron, C. Robin, C. Varlet-Grancher, D. Afif, and A. Guckert Light quality (red:far-red ratio): does it affect photo-synthetic activity, net CO2 assimilation, and morphology of young white clover leaves? 1425

J. Kevin Vessey and Bert Luit The nitrate-tolerant symbiosis ofGlycine max(L.) Merr. nts382 andBradyrhizobium japonicumis also tolerant of ammonium 1432

D. Marshall Porterfield, Anxiu Kuang, Peter J.S. Smith, Mark L. Crispi, and Mary E. Musgrave Oxygen-depleted zonesinside reproductive structures ofBrassicaceae: implications for oxygen control of seed development 1439

Shannon L. Morrison and Jane Molofsky Environmental and genetic effects on the early survival and growth of the invasivegrassPhalaris arundinacea 1447

Lorne M. Wolfe and Leslie J. Rissler Reproductive consequences of a gall-inducing fungal pathogen (Exobasidium vaccinii) onRhododendron calendulaceum(Ericaceae) 1454

Contents / Sommaire C-7

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Page 8: Contents Volume 77, 1999

Philippe Laflamme, Nicole Benhamou, Guy Bussières, and Michel DessureaultDifferential effect of chitosan on root rot fun-gal pathogens in forest nurseries 1460

Reinhard Berndt Chrysomyxarust: morphology and ultrastructure of D-haustoria, uredinia, and telia 1469

Abdelfattah Abdellaoui, Asia Larhnim et Ahmed Talouizte Accumulation, absorption et assimilation des nitrates chez dif-férentes variétés de blé tendre marocain : influence de la lumière 1485

Tod D. Ramsfield, Simon F. Shamoun, Zamir K. Punja, and William E. Hintz Variation in the mitochondrial DNA of thepotential biological control agentChondrostereum purpureum 1490

J. Rachich and R.J. Reader An experimental study of wetland invasibility by purple loosestrife (Lythrum salicaria) 1499

Karsten Zunk, Klaus Mummenhoff, and Herbert Hurka Phylogenetic relationships in tribe Lepidieae (Brassicaceae) based onchloroplast DNA restriction site variation 1504

María Jesús Martínez, José María Barrasa, Ana Gutiérrez, José Carlos del Río, and Angel T. Martínez Fungal screeningfor biological removal of extractives fromEucalyptus globuluswood 1513

J.M. Kranabetter The effect of refuge trees on a paper birch ectomycorrhiza community 1523

Tim Parshall Documenting forest stand invasion: fossil stomata and pollen in forest hollows 1529

November / novembre

ARTICLES

Eric Nicolini et Bernard Chanson La pousse courte, un indicateur du degré de maturation chez le hêtre (Fagus sylvaticaL.) 1539

M.W. Harding, J.C. Stutz, and R.W. Roberson Host–parasite relationships in bean cultivars of varying susceptibility to beanrust 1551

W.A. Charlton Studies in the Alismataceae. X. Floral organogenesis inLuronium natans(L.) Raf. 1560

W.A. Charlton Studies in the Alismataceae. XI. Development of the inflorescence and flowers ofWiesneria triandra(Dalzell)Micheli 1569

Marcia Monreal, S.M. Berch, and Mary Berbee Molecular diversity of ericoid mycorrhizal fungi 1580

Sylvie Sabatier, Daniel Barthélémy, Isabelle Ducousso et Eric Germain Allongement et morphologie de pousses annuelles is-sues de greffe chez le noyer commun,Juglans regiaL. cv. Lara (Juglandaceae) 1595

Lori A. Gom and Stewart B. Rood Fire induces clonal sprouting of riparian cottonwoods 1604

M.A. Fieldes and L.M. Amyot Evaluating the potential of using 5-azacytidine as an epimutagen 1617

Florence Fontaine, Hatem Chaar, Francis Colin, Christophe Clément, Monique Burrus, and Jean-Louis Druelle Prefor-mation and neoformation of growth units on 3-year-old seedlings ofQuercus petraea 1623

Rafael Porras and Jesús Miguel Muñoz Álvarez Breeding system in the cleistogamous speciesCentaurea melitensis(Aster-aceae) 1632

Bret E. Olson and Roseann T. Wallander Carbon allocation inEuphorbia esulaand neighbours after defoliation 1641

Laura A. Hyatt, Ann S. Evans, and Carol C. Baskin Annual dormancy cycles inLesquerella fendleri(Brassicaceae) seedsstored under both field and laboratory conditions 1648

Nina Sletvold and Geir Hestmark A comparative test of the predictive power of neighbourhood models in natural populations ofLasallia pustulata 1655

Daniel F. Brunton and Donald M. Britton Isoetes×echtuckerii, hyb. nov., a new triploid quillwort from northeastern NorthAmerica 1662

Thomas. G. Pfleeger, Christopher C. Mundt, and Michelle A. da Luz Effects of wheat leaf rust on interactions betweenwheat and wild oats planted at various densities and proportions 1669

NOTE

Sarena M. Selbo and Jeffrey S. Carmichael Reproductive biology of leafy spurge (Euphorbia esulaL.): breeding systemanalysis 1684

December / décembre

ARTICLES

Marie Widén and Björn Widén Sex expression in the clonal gynodioecious herbGlechoma hederacea(Lamiaceae) 1689

C-8 Can. J. Bot. Vol. 77, 1999

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Thomas E. O’Dell, Joseph F. Ammirati, and Edward G. Schreiner Species richness and abundance of ectomycorrhizal basid-iomycete sporocarps on a moisture gradient in theTsuga heterophyllazone 1699

Björn Berg, Ryszard Laskowski, and Amalia Virzo De Santo Estimated nitrogen concentrations in humus based on initial ni-trogen concentrations in foliar litter: a synthesis. XII. Long-term decomposition in a Scots pine forest 1712

Lars Hedenäs How important is phylogenetic history in explaining character states in pleurocarpous mosses? 1723

Bernhard Denneler, Yves Bergeron, and Yves Bégin An attempt to explain the distribution of the tree species composing theriparian forests of Lake Duparquet, southern boreal region of Quebec, Canada 1744

Kadri Põldmaa, Ellen Larsson, and Urmas Kõljalg Phylogenetic relationships inHypomycesand allied genera, with emphasison species growing on wood-decaying homobasidiomycetes 1756

Jeffrey L. Walck, Carol C. Baskin, and Jerry M. Baskin Seeds ofThalictrum mirabile(Ranunculaceae) require cold stratifica-tion for loss of nondeep simple morphophysiological dormancy 1769

Sam Neill and Kevin S. Gould Optical properties of leaves in relation to anthocyanin concentration and distribution 1777

Lauchlan H. Fraser and J. Philip Grime Aphid fitness on 13 grass species: a test of plant defence theory 1783

Alexandra Riethmüller, Michael Weiß, and Franz Oberwinkler Phylogenetic studies of Saprolegniomycetidae and relatedgroups based on nuclear large subunit ribosomal DNA sequences 1790

Zamir K. Punja and Li-Juan Sun Morphological and molecular characterization ofChalara elegans(Thielaviopsis basicola),cause of black root rot on diverse plant species 1801

Pedro W. Crous, Ji-Chuan Kang, Conrad L. Schoch, and Godwin R.A. Mchau Phylogenetic relationships ofCylindroclad-ium pseudogracileandCylindrocladium rumohraewith morphologically similar taxa, based on morphology and DNA sequencesof internal transcribed spacers andβ-tubulin 1813

E.W. van der Heijden, F.W. de Vries, and Th.W. Kuyper Mycorrhizal associations ofSalix repensL. communities in succes-sion of dune ecosystems. I. Above-ground and below-ground views of ectomycorrhizal fungi in relation to soil chemistry1821

E.W. van der Heijden and M. Vosatka Mycorrhizal associations ofSalix repensL. communities in succession of dune ecosys-tems. II. Mycorrhizal dynamics and interactions of ectomycorrhizal and arbuscular mycorrhizal fungi 1833

Note of Appreciation / Note de reconnaissance iii

Author Index for Volume 77 / Index des auteurs pour le volume 77 AI-1

Subject Index for Volume 77 / Index des matiéres pour le volume 77 SI-1

Contents for Volume 77 / Sommaire pour le volume 77 C-1

Contents / Sommaire C-9

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