Structural studies of zoospore attractants from Trachelospermum jasminoides var. pubescens: Taxifolin 3-O-glycosides

Hosoi S., Shimizu E., Ohno K., Yokosawa R., Kuninaga S., Coskun M., ...More

PHYTOCHEMICAL ANALYSIS, vol.17, no.1, pp.20-24, 2006 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 17 Issue: 1
  • Publication Date: 2006
  • Doi Number: 10.1002/pca.876
  • Journal Name: PHYTOCHEMICAL ANALYSIS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.20-24
  • Keywords: absolute configuration, dihydroflavonol glycosides, (2S, 3S)-taxifolin 3-O-arabinoside, Trachelospermum jasminoides var. pubescens : biological effects, zoospore attractants
  • Ankara University Affiliated: No

Abstract

(2S, 3S)-Taxifolin 3-O-arabinoside, a new dihydroflavonol glycoside, together with the known substances, (2R, 3R)-taxifolin 3-O-arabinoside, astragalin, isoquercitrin, and cosmosiin, were isolated from the leaves of Trachelospermum jasminoides var. pubescens. Structural elucidation was carried out by spectroscopic methods, and the absolute configurations of C-2 and C-3 in taxifolin 3-O-arabinosides were determined on the basis of circular dichroism. Unlike the dihydroflavonol glycosides, (2R, 3R)taxifolin 3-O-glucoside and (2R, 3R)-taxifolin 3-O-arabinoside, the novel (2S, 3S)-taxifolin 3-O-arabinoside is not effective as a zoospore attractant of the plant pathogenic fungus Aphanomyces cochlioides. Copyright (c) 2005 John Wiley & Sons, Ltd.