Department of Plant and Forest Protection, Swedish University of Agricultural Sciences, P.O. Box 7044, S-750 07, Uppsala, Sweden.
J Chem Ecol. 1992 Mar;18(3):271-82. doi: 10.1007/BF00994231.
Responses of sawfly larvae (Hymenoptera, Diprionidae) to the flavonoid taxifolin glucoside in their host plant were studied in a laboratory experiment. Larvae ofNeodiprion sertifer andDiprion pini were raised from egg hatch to cocoon spinning on two Scots pine (Pinus sylvestris) chemotypes, one without needle taxifolin glucoside (-) and the other containing 2-4% taxifolin glucoside (+). The (+) chemotype had somewhat lower concentrations of needle terpenoids (resin acids) than the (-) chemotype. Current-year needles had higher taxifolin glucoside concentrations than mature needles. There were no differences in survival or body size betweenN. sertifer larvae that fed on the (+) chemotype and those that fed on the (-) chemotype. FemaleD. pini larvae raised on (+) needles developed 6% more slowly than larvae fed (-) needles. The results from this study are contrary to earlier findings showing that flavonoid glucosides have strong negative effects on insect performance. Possible explanations for the different outcomes are discussed.
在实验室实验中研究了叶蜂幼虫（膜翅目，叶蜂科）对其宿主植物中类黄酮紫杉苷葡萄糖苷的反应。从卵孵化到茧纺Neodiprion sertifer 和 Diprion pini 的幼虫在两种苏格兰松树（Pinus sylvestris）化学型上饲养，一种不含针叶紫杉苷葡萄糖苷（-），另一种含有 2-4%的紫杉苷葡萄糖苷（+）。（+）化学型的针叶萜烯（树脂酸）浓度略低于（-）化学型。当年生针叶中的紫杉苷葡萄糖苷浓度高于成熟针叶。在以（+）化学型为食的N. sertifer 幼虫和以（-）化学型为食的幼虫之间，存活率或体型没有差异。在（+）针上饲养的雌性 D. pini 幼虫比在（-）针上饲养的幼虫发育慢 6%。本研究的结果与早期发现的黄酮苷葡萄糖苷对昆虫表现有强烈负面影响的结果相反。讨论了不同结果的可能解释。
