Effects of stilbenes from bark of <Emphasis Type="Italic">Picea glehnii</Emphasis> (Sieb. et Zucc) and their related compounds against feeding behaviour of <Emphasis Type="Italic">Reticulitermes speratus</Emphasis> (Kolbe) |
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Authors: | Email author" target="_blank">Sakae?ShibutaniEmail author Masahiro?Samejima Shuichi?Doi |
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Institution: | (1) Institute of Wood Technology, Akita Prefectural University, Noshiro 016-0876, Japan;(2) Department of Biomaterial Sciences, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo 113-8657, Japan |
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Abstract: | The effects of stilbene glucosides and related compounds on termite feeding behavior were investigated using paper disc methods against the subterranean termite Reticulitermes speratus. The stilbene-rich fraction and isorhapontin (3 -methoxy-3,4 , 5-trihydroxystilbene-3- -d-glucoside) from bark extracts of Picea glehnii showed avoidance by termites in choice tests. In the no-choice tests using compounds purified from the stilbene-rich fraction, the largest feeding deterrent effect was observed for piceid (3,4 ,5-trihydroxystilbene-3- -d-glucoside), followed by isorhapontin, and astringin (3,3 ,4 ,5-tetrahydroxystilbene-3- -d-glucoside), at the concentrations from 0.63 to 2.5 µmol/disc. No change in activity was observed at retentions of more than 5.0 µmol/disc. When the activities of isorhapontin and its aglycone derivative (isorhapontigenin: 3 -methoxy-3,4 ,5-trihydroxystilbene) were compared with that of taxifolin (3,3 ,4 ,5,7-pentahydroxyflavanone) in the no-choice test, the stilbenes exhibited a larger antifeedant potential. Methylation of isorhapontigenin increased its termiticidal activity.Part of this study was presented at the 32nd Annual Meeting of the International Research Group on Wood Preservation, 2001 |
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Keywords: | Stilbenes Picea glehnii Bark Termite Antitermite activity |
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