颈双缘姬蜂寄生引起小菜蛾蛹脂肪体形态和超微结构的变化

›› 2007, Vol. 50 ›› Issue (7): 662-666.

颈双缘姬蜂寄生引起小菜蛾蛹脂肪体形态和超微结构的变化

郦卫弟，时敏，陈学新^*

(浙江大学昆虫科学研究所，杭州 310029)

出版日期:2007-08-21 发布日期:2007-08-21
通讯作者: 陈学新

Effects of parasitism by Diadromus collaris (Hymenoptera: Ichneumonidae) on morphology and ultrastructure of fat body and adipocytes of host Plutella xylostella (Lepidoptera: Plutellidae) pupae

LI Wei-Di, SHI Min, CHEN Xue-Xin

(Institute of Insect Sciences, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China)

Online:2007-08-21 Published:2007-08-21
Contact: CHEN Xue-Xin

摘要/Abstract

摘要：

采用光学和电子显微镜观察了颈双缘姬蜂Diadromus collaris（膜翅目：姬蜂科）寄生后小菜蛾Plutella xylostella（鳞翅目：菜蛾科）蛹脂肪体形态、超微结构和脂肪细胞的变化。结果表明：被寄生72 h后小菜蛾蛹脂肪体结构松散，细胞游离，细胞膜破裂；细胞内营养物质开始被动地消耗；细胞器数量减少，细胞核内染色质状态发生变化。这些现象说明寄生对寄主的脂肪体结构及脂肪细胞产生了明显的影响，这有利于为幼蜂的发育提供营养。

关键词: 颈双缘姬蜂, 小菜蛾, 脂肪体, 脂肪细胞, 超微结构, 寄生

Abstract: In order to determine the effects of parasitism by Diadromus collaris (Hymenoptera: Ichneumonidae) on structure of fat body of host Plutella xylostella (Lepidoptera: Plutellidae) pupae, the morphology and ultrastructure of pupal fat body and adipocytes of the diamondback moth, P. xylostella parasitized by D. collaris were observed using light and electron microscopy. After 72 h of parasitism, the structure of fat body became loose; the adipocytes were dissociated from fat body; the membrane of adipocyte was torn, its entocyte was consumed passively, the number of apparatus of cell reduced, and the morphology of nuclear chromatin was changed. It is so concluded that parasitism by parasitoid can make host fat body and adipocytes fell to pieces, and this is advantageous for development of parasitoid.

Key words: Diadromus collaris, Plutella xylostella, fat body, adipocytes, ultrastructure, parasitism

郦卫弟，时敏，陈学新^*. 颈双缘姬蜂寄生引起小菜蛾蛹脂肪体形态和超微结构的变化[J]. , 2007, 50(7): 662-666.

LI Wei-Di, SHI Min, CHEN Xue-Xin. Effects of parasitism by Diadromus collaris (Hymenoptera: Ichneumonidae) on morphology and ultrastructure of fat body and adipocytes of host Plutella xylostella (Lepidoptera: Plutellidae) pupae[J]. , 2007, 50(7): 662-666.

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