期刊
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY
卷 105, 期 1, 页码 13-17出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.pestbp.2012.11.001
关键词
Bombyx mori; Phoxim; Cytochrome P450 monooxygenase; Glutathione-S-transferase; Carboxylesterase
资金
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- National Natural Science Foundation of China [31072086]
- China Agriculture Research System [CARS-22-ZJ0305]
- Projects in the Science & Technology support Program of Suzhou [ZXS2012005]
Silkworm (Bombyx mori) is an economically important insect. However, non-cocoon caused by chemical insecticide poisoning has largely hindered the development of sericulture. To explore the roles of detoxification enzymes in B. mori after insecticide poisoning, we monitored the activity changes of cytochrome P450 monooxygenase, glutathione-S-transferase, and carboxylesterase in B. mori midgut and fatbody after phoxim feeding. At the same time, the expression levels of detoxification enzyme-related genes were also determined by real-time quantitative PCR. Compare to the control levels, the activity of P450 in the midgut and fatbody was increased to 1.72 and 6.72 folds; the activity of GST was no change in midgut, and in fatbody increased to 1.11 folds; the activity of carboxylesterase in the midgut was decreased to 0.69 folds, and in fatbody increased to 1.13 folds. Correspondingly, the expression levels of detoxifying enzyme genes CYP6ae22, CYP9a21, GSTo1 and Bmcce were increased to 15.99, 332, 1.86 and 2.30 folds in the midgut and to 3.58, 1.84, 2.14 and 4.21 folds in the fatbody after phoxim treatment. These results demonstrated the important roles of detoxification enzymes in phoxim metabolism. In addition, the detected activities of such enzymes were generally lower than those in cotton bollworms (Helicoverpa armigera), which may contribute to the high susceptibility of B. mori to insecticides. Our findings laid the foundation for further investigations of the molecular mechanisms of organophosphorus pesticide metabolism in B. mori. (C) 2012 Elsevier Inc. All rights reserved.
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