烟青虫幼虫味觉可塑性行为研究

目的]研究烟青虫幼虫的可塑性行为,为害虫防治提供参考。方法]采用行为试验双选法和切除味觉感受器研究了不同取食经历烟青虫5龄幼虫对取食抑制素的味觉可塑性行为。结果]正常人工饲料饲养幼虫对取食抑制素十分敏感,切除了侧栓锥感受器的幼虫对取食抑制素的反应与正常幼虫相似,切除了中栓锥感受器的幼虫对取食抑制素不敏感。而用含有低浓度取食抑制素的人工饲料饲养的幼虫对取食抑制素不敏感。结论]中栓锥感受器中含有对取食抑制素敏感的味觉神经元,不同取食经历的烟青虫幼虫对取食抑制素具有行为可塑性。

Study on Taste Plasticity in Helicoverpa assulta Larva

Objective] The aim was to provide a reference for pest control by studying the taste plasticity in Helicoverpa assulta.Method] The two choices assays and taste sensilla ablation were used to investigate the taste plasticity on the deterrents in 5th instar larvae of H.assula which were reared on different artificial diets.Result] The larvae reared on normal artificial diets were sensitive to the deterrents,the caterpillars with ablation of the lateral sensillum styloconica reacted to the deterrents as normal larvae.Meantime,the caterpillars with ablation of the medial sensillum styloconica were insensitive to the deterrents.However,the caterpillars reared on the artificial diets containing low deterrents showed insensitivity to the deterrents.Conclusion] The medial sensillum styloconica contains the taste neurons which is sensitive to deterrents and there is a taste plasticity in different food experienced caterpillars of H.assulta..