ChabotBecardPiche1992

Référence

Chabot, S., Becard, G. and Piche, Y. (1992) Life-Cycle of Glomus-Intraradix in Root Organ-Culture. Mycologia, 84(3):315-321.

Résumé

The entire vegetative life cycle of the vesicular-arbuscular mycorrhizal fungus Glomus intraradix was followed in a simple monoxenic culture system using Ri T DNA-transformed carrot roots and nontransformed tomato roots as plant partners. Fungal development, from the growth of initial germ tubes to the formation of an external mycelium network and spore production, was observed nondestructively using light microscopy. Surface-sterilized spores isolated from pot culture constituted an excellent source of fungal inoculum. These spores germinated readily on the nutrient medium and only a low rate of contamination was recorded. Germ tubes approaching the surface of isolated roots changed their growth pattern and branched profusely in response to root factors. Throughout the growth process it was possible to observe directly the formation of terminal and intercalary secondary spores, numerous hyphal anastomoses and arbuscle-like structures, intracellular vesicles and spores. The extent of internal root colonization by G. intraradix was relatively limited. but it was sufficient to permit the in vitro formation of hundreds of new spores free of contaminants. which were viable and capable of colonizing host roots.

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@ARTICLE { ChabotBecardPiche1992,
    AUTHOR = { Chabot, S. and Becard, G. and Piche, Y. },
    TITLE = { Life-Cycle of Glomus-Intraradix in Root Organ-Culture },
    JOURNAL = { Mycologia },
    YEAR = { 1992 },
    VOLUME = { 84 },
    PAGES = { 315-321 },
    NUMBER = { 3 },
    NOTE = { Times Cited: 74 Article English Cited References Count: 26 Ja622 },
    ABSTRACT = { The entire vegetative life cycle of the vesicular-arbuscular mycorrhizal fungus Glomus intraradix was followed in a simple monoxenic culture system using Ri T DNA-transformed carrot roots and nontransformed tomato roots as plant partners. Fungal development, from the growth of initial germ tubes to the formation of an external mycelium network and spore production, was observed nondestructively using light microscopy. Surface-sterilized spores isolated from pot culture constituted an excellent source of fungal inoculum. These spores germinated readily on the nutrient medium and only a low rate of contamination was recorded. Germ tubes approaching the surface of isolated roots changed their growth pattern and branched profusely in response to root factors. Throughout the growth process it was possible to observe directly the formation of terminal and intercalary secondary spores, numerous hyphal anastomoses and arbuscle-like structures, intracellular vesicles and spores. The extent of internal root colonization by G. intraradix was relatively limited. but it was sufficient to permit the in vitro formation of hundreds of new spores free of contaminants. which were viable and capable of colonizing host roots. },
    KEYWORDS = { glomus-intraradix invitro life cycle root organ culture vesicular-arbuscular mycorrhizae t-DNA gigaspora-margarita infection vesicles growth tomato },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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