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淡足侧沟茧蜂寄生对甜菜夜蛾幼虫血淋巴总糖、蛋白质及虫体脂质含量的影响
The effect of parasitization by Microplitis pallidipes Szepligeti&n(Hymenoptera: Braconidae) on the total protein and sugar and lipid < content of Spodoptera exigua (Hübner) (Lepidoptera: Noctuidae) larvae
季香云1,2,印杨毅2,万年峰2,谭继才1,蒋杰贤2
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DOI:
作者单位:1. 湖南农业大学生物安全科学技术学院长沙410128;2. 上海市农业科学院生态环境保护研究所/上海市设施园艺技术重点实验室上海201403
中文关键词:淡足侧沟茧蜂, 甜菜夜蛾, 总糖, 蛋白质, 脂质, 血淋巴
英文关键词:Microplitis pallidipes, Spodoptera exigua, parasitization, total sugar, protein, lipid, hemolymph
中文摘要:      为探讨淡足侧沟茧蜂Microplitis pallidipes Szepligeti调控寄主的生理机制,测定了淡足侧沟茧蜂寄生后,甜菜夜蛾Spodoptera exigua (Hübner)幼虫血淋巴总糖、蛋白质及虫体脂类含量的变化。研究结果表明,寄生后连续5 d的观察时间内,甜菜夜蛾幼虫血淋巴总糖含量从寄生后第1天开始就高于未寄生寄主幼虫,且在寄生后第2至5 天达到显著水平;除寄生后第3天外,被寄生寄主幼虫血淋巴总蛋白质含量始终低于未寄生幼虫,且在寄生后第1、4、5 天达到显著水平;甜菜夜蛾被寄生后,虫体脂质含量始终高于未寄生幼虫,且从寄生后第2天开始达到显著水平。本研究揭示,淡足侧沟茧蜂寄生刺激了寄主甜菜夜蛾幼虫血淋巴总糖合成,但抑制了其蛋白质合成,同时也刺激了甜菜夜蛾虫体脂质合成。
英文摘要:     To discuss the physiological effects of parasitization by parasitoids on host larvae, we studied the effect of the parasitism by Microplitis pallidipes Szepligeti on the total protein concentration and sugar concentration in the hemolymph, and the lipid content of Spodoptera exigua (Hübner) larvae. The results indicated that the total sugar concentration in the hemolymph began to increase from day 1 after parasitization and were significantly greater, on days 2 and 5, total hemolymph protein was consistently lower in the parasitized than unparasitized group and these differences were significant on days 1, 4 and 5. The lipid content of parasitized larvae was consistently higher than that of unparasitized larvae and this difference began to be significant from day 2 after parasitization. Our results indicated that parasitization by M. pallidipes stimulated total sugar synthesis but inhibited protein synthesis in hemolymph, and meanwhile stimulated the lipid synthesis in larvae of S. exigua.
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