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Induction of phytoalexins in adzuki bean after inoculation with Phytophthora vignae f. sp adzukicola

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Title: Induction of phytoalexins in adzuki bean after inoculation with Phytophthora vignae f. sp adzukicola
Authors: Harada, Genki Browse this author
Kondo, Norio Browse this author →KAKEN DB
Keywords: Phytophthora stem rot
Phytophthora vignae f. sp adzukicola
Adzuki bean
Vigna angularis
Issue Date: Dec-2009
Publisher: Springer Japan
Journal Title: Journal of General Plant Pathology
Volume: 75
Issue: 6
Start Page: 432
End Page: 436
Publisher DOI: 10.1007/s10327-009-0203-z
Abstract: To identify phytoalexins of adzuki bean elicited in response to attempted infection of Phytophthora vignae f. sp. adzukicola, we isolated compounds from adzuki bean and evaluated their antifungal activity. Seven flavonoids (daidzein, genistein, 2'-hydroxygenistein, coumestrol, dalbergioidin, kievitone, and phaseol) were identified from epicotyls wound-inoculated with a mycelial suspension of an avirulent race of P. vignae f. sp. adzukicola. Of those compounds, kievitone and dalbergioidin accumulated to higher levels in incompatible interactions compared to compatible interactions 48 h after inoculation. Kievitone strongly inhibited the germination of encysted zoospores, and dalbergioidin were slightly suppressive. From these results, we concluded that kievitone and dalbergioidin are phytoalexins in adzuki bean.
Rights: The original publication is available at
Type: article (author version)
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 近藤 則夫

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