Temporal allocation of metabolic tolerance in the body of beet armyworm in response to three gossypol-cotton cultivars

作     者：Marvin K HARRIS 

作者机构：Department of EntomologyTexas A&M University of USA 

出 版 物：《Science China(Life Sciences)》 (中国科学（生命科学英文版）)

年 卷 期：2009年第52卷第12期

页      面：1140-1147页

核心收录：

学科分类：09[农学] 0904[农学-植物保护] 090401[农学-植物病理学] 090402[农学-农业昆虫与害虫防治] 

基　　金：Supported by the National Basic Research Program of China (Grant No.2006CB102004) the National Natural Science Fund of China (Grant No. 30800724) International Foundation for Sciences (Grant No. C/4559-1) New Detecting Technology of Exogenous Gene Protein (Grant Nos. 2008ZX08012-005,2009ZX08011- 013B and 2009ZX08012-005B) 

主　　题：Spodoptera exigua gossypol free fatty acid detoxification enzyme acetylcholinesterase total superoxide dismutase 

摘      要：The nutrient composition and enzyme activities in larvae of the beet armyworm, Spodoptera exigua (Hbner), fed on high, medium or low gossypol cotton cultivars were examined at different time intervals. Significantly lower free fatty acid was observed in larvae fed for 6 h on high gossypol M9101 compared to larvae fed on the low (ZMS13) and intermediate (HZ401) gossypol cultivars. Significantly higher trypsin activity was observed in larvae fed on high gossypol M9101 for 24 h compared to those fed for 1, 4 and 6 h. Significantly higher catalase and total superoxide dismutase enzyme activities were observed in larvae of S. exigua fed on high gossypol M9101 compared with low gossypol cultivars ZMS13 and HZ401 for 1, 4, 6 and 24 h. However, significantly lower carboxylesterase and acetylcholinesterase enzyme activities were found in larvae fed on high gossypol M9101 compared with the other cultivars for 1, 4, 6 and 24 h. The interaction between cotton variety and beet armyworm infestation time significantly affected the carboxylesterase enzyme activity in S. exigua. The characterization of the effects of plant allelochemicals on herbivorous larvae is important for aiding understanding of plant-insect interaction as well as in devising solutions to pest problems by breeding plant resistance, identifying metabolic targets for insecticide development, etc.