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Zoosporicidal activities of anacardic acids against Aphanomyces cochlioides.

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Title: Zoosporicidal activities of anacardic acids against Aphanomyces cochlioides.
Authors: Begum, Parvin Browse this author
Hashidoko, Yasuyuki Browse this author →KAKEN DB
Islam, Md Tofazzal Browse this author
Ogawa, Yuko Browse this author
Tahara, Satoshi Browse this author
Keywords: Anacardic Acids
Ginkgo biloba
Zoospore Lysis
Issue Date: Sep-2002
Publisher: Verlag der Zeitschrift für Naturforschung
Journal Title: Zeitschrift für Naturforschung. C, Journal of biosciences
Volume: 57
Issue: 9-10
Start Page: 874
End Page: 882
PMID: 12440727
Abstract: The EtOAc soluble constituents of the unripe fruits of Ginkgo biloba showed motility inhibition followed by lysis of zoospores of the phytopathogenic Aphanomyces cochlioides. We purified 22:1-omega7-anacardic acid (1), 24:1-omega9-anacardic acid (2) and 22:0-anacardic acid (3), together with other related compounds, 21:1-omega7-cardol (4) and 21:1-omega7-cardanol (5) from the crude extracts of Ginkgo fruits. Amongst them, compound 1 was a major active agent in quality and quantity, and showed potent motility inhibition (98% in 30 min) followed by lysis (55% in 3 h) of the zoospores at 1 x 10(-7) M. The 2-O-methyl derivative (1-c) of 1 displayed antibacterial activity against Bacillus subtilis, but practically inactive to Escherichia coli. A brief study on structure-activity relationships revealed that a carboxyl group on the aromatic ring and an unsaturated side chain in the anacardic acid derivative are important for strong motility inhibitory and lytic activities against the zoospore.
Type: article
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: 橋床 泰之

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