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. 1992 Nov;122(3):461-467.
doi: 10.1111/j.1469-8137.1992.tb00074.x.

Hyphal growth promotion in vitro of the VA mycorrhizal fungus, Gigaspora margarita Becker & Hall, by the activity of structurally specific flavonoid compounds under CO2 -enriched conditions

S Chabot  1 , R Bel-Rhlid  2 , R Chênevert  2 , Y Piché  1
Affiliations
Free article

Hyphal growth promotion in vitro of the VA mycorrhizal fungus, Gigaspora margarita Becker & Hall, by the activity of structurally specific flavonoid compounds under CO2 -enriched conditions

S Chabot et al. New Phytol. 1992 Nov.
Free article

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 μ 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; carbon dioxide; flavonoid; structure-activity relationship; vesicular-arbuscular mycorrhizal fungi.

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References

references

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