苏云金芽孢杆菌以色列变种内毒素对埃及伊蚊幼虫肠道的细胞病理学效应
[Cytopathological effect of Bacillus thuringiensis israelensis endotoxins on the intestines of Aedes aegypti mosquito larvae].
作者信息
Zalunin I A, Chaĭka S Iu, Dronina M A, Revina L P
出版信息
Parazitologiia. 2002 Sep-Oct;36(5):337-44.
The dynamics of pathological changes in the intestine of Aedes aegypti larvae under the influence of toxins Cry11A and Cry4B produced by Bacillus thuringiensis israelensis was studied by means of electron microscope. Most significant ultrastructure changes in the intestine of the second instar larvae were observed in the midgut. The cytoplasm of cells disintegrated, and elongated lacunae appeared. The number of microvilli decreased, or they disappeared in the result of destruction. The peritrophic membrane displaced to the lumen of midgut. Any changes in epithelial cells and cuticle in time of foregut and hindgut were not observed in a comparison to control. The toxin Cry4B caused the most effective destruction of the midgut epithelium.
利用电子显微镜研究了苏云金芽孢杆菌以色列亚种产生的毒素Cry11A和Cry4B对埃及伊蚊幼虫肠道病理变化的影响。在二龄幼虫的肠道中，中肠观察到最显著的超微结构变化。细胞的细胞质解体，出现细长的腔隙。微绒毛数量减少，或因破坏而消失。围食膜向中肠腔移位。与对照组相比，前肠和后肠上皮细胞和角质层在当时未观察到任何变化。毒素Cry4B对中肠上皮的破坏最为有效。
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