STOYKE, G., and CURRAH, R. S . 1991. Endophytic fungi from the mycorrhizae of alpine ericoid plants. Can. J . Bot. 69: 347-352. Strains of a slow-growing, sterile, darkly pigmented fungus were obtained from alpine mycorrhizae of the Alberta Rocky Mountains. Sporulating isolates of this fungus from the roots of Cassiope mertetlsiana and Arctostaphylos uva-ursi (Ericaceae) as well as from Luetkea pectinata (Rosaceae) were identified as Phialocephala fortinii. Axenic cultures of Menziesia ferruginea (Ericaceae) seedlings were grown with P. fortinii for characterization of the fungus-root association. Typically, dark, simple septate hyphae form extensive wefts on the root surface and produce intracortical sclerotia of compact, darkly pigmented and irregularly lobed, thick-walled hyphae. Intracellular coils are not produced. This association differs from the ericoid mycorrhizal type and represents a fungus-root association that is common in alpine plants. In addition, several isolates of Oidiodendron griseum, a species previously reported from mycorrhizae of ericaceous plants, were found to form intracellular coils within the cortical root cells of Loiseleuria procumbens (Ericaceae). STOYKE, G., et CURRAH, R. S. 1991. Endophytic fungi from the mycorrhizae of alpine ericoid plants. Can. J. Bot. 69 : 347-352. A partir des mycorhizes de plantes alpines provenant des Montagnes Rocheuses en Alberta, les auteurs ont obtenus des isolats fongiques constitues de mycCliums stCriles B pigments fonces et B croissance lente. Des isolats de tels champignons provenant des racines du Cassiope mertensiana et de 1' Arctostaphylos uva-ursi (EricacCes) ainsi que du Luetkea pectinata (RosacCes) ont ete identifies comme Phialocephala fortinii. Afin de caractiriser l'association champignon-racine, les auteurs ont co-cultivC le P. fortinii avec des plantules de Menziesia ferruginea (Ericacdes) en culture aseptique. Des hyphes typiques, fonces et septe ont form6 des touffes extensives sur la surface racinaire en produisant des sclt5rotes intra-corticales constituCs d'hyphes a paroi Cpaisse, a pigmentation fon~Ce et irrkgulikrement lobCs. Cette association diffkre du type mycorhizien ericoi'de et represente une association champignon-racine commune chez les plantes alpines. De plus, les auteurs montrent que plusieurs isolats de l'Oidiodendro~z griseum, une espkce dCjB obtenue a partir de mycorhizes Cricoi'des, forme des pelotons intracellulaires dans les cellules corticales racinaires du Loiseleurai procumbens (EricacCes).
No abstract
The seasonal development and mycorrhizal fungi of the mycorrhizae of Platanthera hyperborea, Platanthera obtusata, Platanthera orbiculata, and Coeloglossum viride are described. Fungal endophytes belonging to the following taxa were identified: Leptodontidium orchidicola, Epulorhiza repens, Epulorhiza anaticula comb, nov., and Ceratorhiza goodyerae-repentis. In addition, anamorphic material of a species tentatively identified as Sebacina sp. was found solely in the mycorrhizae of P. orbiculata. A series of isolates bearing distinctive, clamped monilioid cells and belonging to an unidentified species of Sistotrema was found in P. obtusata. This is the first report of a Sistotrema species from orchid mycorrhizae. An isolate from C. viride, with broad hyphae, large globose monilioid cells, and dark brown mycelium, resembles Burgeff's 1936 description of Rhizoctonia anomala nom.inval. This taxon is validated, redescribed, and presented as the new species Moniliopsis anomala.
STOYKE, G., ECCER, K. N., and CURRAH, R. S. 1992. Characterization of sterile endophytic fungi from the mycorrhizae of subalpine plants. Can. J. Bot. 70: 2009-2016. Isolates of 117 dematiaceous and 10 hyaline, septate, sterile fungi were obtained from the roots of 26 plants belonging to Poaceae, Caryophyllaceae, Rosaceae, Ericaceae, Primulaceae, and Asteraceae from a subalpine dwarf shrub heath in the Alberta Rocky Mountains. The isolates were sorted into 33 culture groups based on colonial morphology. Strains representative of the different culture groups were compared with fungi of known identity (Cenococcutn geopl~ilutn, Hynzerzoscyplz~~s ericae, Pllialocephala dirnorphospora, Phialocephala fortirzii, Phialophorafinlandia) using restriction fragment analysis of an amplified portion of ribosomal DNA. Cluster analysis and ordination based on restriction fragment polyn~orphisms indicated that two-thirds of the isolates were closely related to or conspecific with Plzialoceplzala fortinii, which therefore appears to represent the dominant root endophyte of the subalpine site. In culture, many of the Plzialocephala fortirlii isolates had sclerotia con~posed of compact masses of darkly pigmented and irregularly lobed, thick-walled hyphae. Five of the isolates clustered independently of the known isolates and are probably each representative of species other than the known strains. Key words: subalpine mycorrhizae, Plzialocephala fortinii, restriction fragment length polymorphism, ribosomal DNA. STOYKE, G., ECCER, K. N., et CURRAH, R. S. 1992. Characterization of sterile endophytic fungi from the mycorrhizae of subalpine plants. Can. J. Bot. 70 : 2009-2016. Les auteurs ont obtenus 127 isolats de champignons stCriles septCs dont 117 sont den1atiacCs et 10 hyalins, h partir des racines de 26 plantes appartenant aux Poaceae, Caryophyllaceae, Rosaceae, Ericaceae, Primulaceae et Asteraceae; ces plantes appartiennent h une lande arbustive subalpine des montagnes Rocheuses en Alberta. Les isolats ont Ctk sCparCs en 33 groupes de culture en se basant sur la morphologie des colonies. Des souches reprksentatives des differents groupes ont CtC comparCes avec des champignons dont llidentitC est connue (Cenococc~lm geophilum, Hymenoscyphus ericae, Phialoceplzala dirnorphospora, Phialocephala fortinii, Pl~ialophorafinlandia), en utilisant I'analyse des fragments de restriction d'une partie de 1'ADN ribosomique amplifiC. L'analyse par groupement et ordination basCe sur le polymorphisme des fragments de restriction indique que deux tiers des isolats sont trks voisins ou conspCcifique avec Pl~ialocephala fortinii, qui semble par consCquent reprksenter I'endophyte racinaire dominant sur ce site subalpin. En culture, plusieurs des isolats du Phialocephala fortinii montrent des sclkrotes composCs de masses d'hyphes Cpais, conlpacts, fortement pigment& et irrtgulikrement lobes. Cinq isolats se retrouvent dans un groupe indkpendant des isolats connus et reprksentant probablement des espkces autres que celles des souches de refkrence utilis...
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
customersupport@researchsolutions.com
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.