DEGRADATION OF THE ISOFLAVONE BIOCHANIN A BY ISOLATES OF NECTRIA HAEMATOCOCCA (FUSARIUM SOLANI)

Article abstract of DOI:10.1016/0031-9422(83)80084-3

Twelve isolates of Nectria haematococca, mating population VI (Fusarium solani) previously characterized for their virulence on pea plants and their ability to degrade the phytoalexin pisatin were assayed for the catabolism of the isoflavone biochanin A (5,7-dihydroxy-4'-methoxyisoflavone).Eleven isolates catabolized the isoflavone along the pathway: biochanin A -> dihydrobiochanin A -> 3-(p-methoxyphenyl)-6-hydroxy-γ-pyrone -> p-methoxyphenylacetic acid -> p-hydroxyphenylacetic acid -> 3,4-dihydroxyphenylacetic acid.Key Word Index - Nectria haematococca; Fusarium solani; isoflavonoids; biochanin A; pisatin; degradation; phytopathogenic fungi.