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Acylated flavonol glycosides as probing stimulants of a bean aphid, Megoura crassicauda, from Vicia angustifolia.

Authors
  • Takemura, Masami
  • Nishida, Ritsuo
  • Mori, Naoki
  • Kuwahara, Yasumasa
Type
Published Article
Journal
Phytochemistry
Publisher
Elsevier
Publication Date
Sep 01, 2002
Volume
61
Issue
2
Pages
135–140
Identifiers
PMID: 12169306
Source
Medline
License
Unknown

Abstract

A bean aphid, Megoura crassicauda, which feeds selectively on the plant genus Vicia (Fabaceae), was found to be stimulated to probe an extract solution of the host plant, narrowleaf vetch, Vicia angustifolia L., depositing characteristic stylet sheaths on a parafilm membrane. Two acylated flavonol glycosides were isolated as the specific probing stimulants from the extracts and characterized as quercetin 3-O-alpha-L-arabinopyranosyl-(1-->6)-[2"-O-(E)-p-coumaroyl]-beta-D-glucopyranoside and quercetin 3-O-alpha-L-arabinopyranosyl-(1-->6)-[2"-O-(E)-p-coumaroyl]-beta-D-galactopyranoside. A mixture of these compounds in the same equivalency strongly induced the probing response from M. crassicauda, suggesting their kairomonal roles during host recognition.

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