ChabotBelrhlidChenevertEtAl1992

Référence

Chabot, S., Belrhlid, R., Chenevert, R. and Piche, Y. (1992) Hyphal Growth Promotion Invitro of the Va Mycorrhizal Fungus, Gigaspora-Margarita Becker and Hall, by the Activity of Structurally Specific Flavonoid Compounds under Co2-Enriched Conditions. New Phytologist, 122(3):461-467.

Résumé

Plant phenolic compounds are known to be inducers of virulence genes in plant-pathogen interactions such as those involving Agrobacterium, and flavonoids are known to be inducers or inhibitors of Nod genes in Rhizobium-legume symbiosis. More recent studies suggest that some of these compounds act as molecular signals in the development of vesicular-arbuscular mycorrhizas (VAM). The present study has shown that hyphal growth of the VAM fungus, Gigaspora margarita Becker & Hall, is affected by both stimulatory and inhibitory flavonoids, when applied at 10 muM together with an optimal carbon dioxide enrichment. Stimulatory compounds were all flavonols (kaempferol, quercetin and morin) and possessed at least one hydroxyl group on the B ring. Conversely, two isoflavones (biochanin A, and genistein), a single flavanone (hesperetin) and two compounds without any hydroxyl group on the B ring, galangin (flavonol) and chrysin (flavone), were all inhibitors of hyphal growth.

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@ARTICLE { ChabotBelrhlidChenevertEtAl1992,
    AUTHOR = { Chabot, S. and Belrhlid, R. and Chenevert, R. and Piche, Y. },
    TITLE = { Hyphal Growth Promotion Invitro of the Va Mycorrhizal Fungus, Gigaspora-Margarita Becker and Hall, by the Activity of Structurally Specific Flavonoid Compounds under Co2-Enriched Conditions },
    JOURNAL = { New Phytologist },
    YEAR = { 1992 },
    VOLUME = { 122 },
    PAGES = { 461-467 },
    NUMBER = { 3 },
    NOTE = { Times Cited: 59 Article English Cited References Count: 29 Kb051 },
    ABSTRACT = { Plant phenolic compounds are known to be inducers of virulence genes in plant-pathogen interactions such as those involving Agrobacterium, and flavonoids are known to be inducers or inhibitors of Nod genes in Rhizobium-legume symbiosis. More recent studies suggest that some of these compounds act as molecular signals in the development of vesicular-arbuscular mycorrhizas (VAM). The present study has shown that hyphal growth of the VAM fungus, Gigaspora margarita Becker & Hall, is affected by both stimulatory and inhibitory flavonoids, when applied at 10 muM together with an optimal carbon dioxide enrichment. Stimulatory compounds were all flavonols (kaempferol, quercetin and morin) and possessed at least one hydroxyl group on the B ring. Conversely, two isoflavones (biochanin A, and genistein), a single flavanone (hesperetin) and two compounds without any hydroxyl group on the B ring, galangin (flavonol) and chrysin (flavone), were all inhibitors of hyphal growth. },
    KEYWORDS = { gigaspora-margarita vesicular arbuscular mycorrhizal fungi flavonoid carbon dioxide structure activity relationship meliloti nodulation genes DNA transformed roots agrobacterium-tumefaciens phenolic-compounds spore germination signal compounds rhizobium expression host identification },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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