摘要
在马尾松毛虫越冬后活动期和第一代五龄幼虫血淋巴中,酯酶活性日变化动态均呈“∽”形曲线,与血糖、血酯含量的日变化之间分别呈正相关和负相关。用溴氰菊酯处理以后,敏感品系中酯酶活性在击倒期下降,至兴奋期回升,痉挛期又大幅度下降,恢复或濒死时又进一步回升,低剂量(LD_5)处理的变幅很大,高剂量(LD_(95))的变幅较小。耐药品系的酯酶活性在击倒期明显下降,以后逐步回升,变幅小于敏感品系。低剂量处理后,敏感品系酯酶与血酯之间出现正相关的变化,而耐药品系的酯酶不仅与血酯之间出现正相关,而且与血糖之间出现负相关,说明两品系中毒以后的代谢及其调控机制是不同的。另外,两品系在低剂量处理后恢复期及高剂量处理后濒死期的酯酶活性相差不大,说明死亡与否和酯酶活性无关。
Effects of deltamethrin on the nemo lymph esterases activity (HEA) of the 5th instar larvae of Dendrolimus punctatus were studied. For the untreated larvae, both the summer larvae and the larvae after hibernation have a-form curve in the daily dynamic changes of HEA. The results also showed that the daily dynamic changes of HEA were negatively correlated with those of hemolymph lipid content(HLC), and positively with hemolymph carbohydrate content(HCC). The treatment of sublethal doses (LD5) of deltamethrjn could cause a positive correlatoin between HEA and HLC in both susceptible strain and tolerant strain, and a negative correlat on between HEA and HCC in the tolerant strain. The activity of hemolymph esterases was found to be closely related to the poisoning syndrome of the deltamethrin. For the susceptible strain, the HEA depleted at the knocking down and conveulsive stages, elevated at exiting and recovering or dying stages. Whereas in the tolerant strain, the HEA depleted at the knocking down stage only, and elevated gradually than after. In those two strains, the levels of HEA in the recovering and dying larvae were the same, this indicated that the hemolymph esterases play a less important part in the lethal effects caused by deltamethrin. Finally the importance of hemolymph esterases in the metabolism of hemolymph lipid and carbohydrate were dicussed.
出处
《林业科学研究》
CSCD
北大核心
1992年第2期188-192,共5页
Forest Research
基金
国家自然科学基金
关键词
马尾松毛虫
酯酶
溴氰菊酯
Dendrolimus pvnctatvs
esterases
deltamethrin
