Isolation and identification of vesicular-arbuscular mycorrhiza-stimulatory compounds from clover (Trifolium repens) roots

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 unde...

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Published inApplied and Environmental Microbiology Vol. 57; no. 2; pp. 434 - 439
Main Authors Nair, M.G. (Michigan State University, East Lansing, MI), Safir, G.R, Siqueira, J.O
Format Journal Article
LanguageEnglish
Published Washington, DC American Society for Microbiology 01.02.1991
Subjects
Biological and medical sciences
CRECIMIENTO
CROISSANCE
ESTIMULO
EXSUDAT
EXUDADOS
FLAVONOIDE
FLAVONOIDES
Fundamental and applied biological sciences. Psychology
Glomus
MICELIO
Microbiology
Microorganism-Plant Interactions
MYCELIUM
RACINE
RAICES
SIMBIOSIS
STIMULUS
SYMBIOSE
TRIFOLIUM REPENS
Vesicle
Symbiotic relation
Leguminosae
Dicotyledones
Angiospermae
Mycorrhiza
Isolation
Stimulation
Spermatophyta
Identification
Trifolium repens
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Summary: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
Bibliography:9114721
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Permanent address: Escola Superior de Agricultura de Lavras, MG-Brazil.
Corresponding author.
ISSN:0099-2240
1098-5336
DOI:10.1128/aem.57.2.434-439.1991