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Appl Environ Microbiol. 1991 Feb;57(2):434-9.

Isolation and Identification of Vesicular-Arbuscular Mycorrhiza-Stimulatory Compounds from Clover (Trifolium repens) Roots.

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  • 1Bioactive Natural Products Laboratory, Department of Horticulture and Pesticide Research Center, and Department of Botany and Plant Pathology, Michigan State University, East Lansing, Michigan 48824.

Abstract

Two isoflavonoids isolated from clover roots grown under phosphate stress were characterized as formononetin (7-hydroxy,4'-methoxy isoflavone) and biochanin A (5,7-dihydroxy,4'-methoxy isoflavone). At 5 ppm, these compounds stimulated hyphal growth in vitro and root colonization of an undescribed vesicular-arbuscular mycorrhiza, a Glomus sp. (INVAM-112). The permethylated products of the two compounds were inactive. These findings suggest that the isoflavonoids studied may act as signal molecules in vesicular-arbuscular mycorrhiza symbiosis.

PMID:
16348409
[PubMed]
PMCID:
PMC182728
Free PMC Article
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