褐飞虱共生菌抗吡虫啉菌株和敏感菌株解毒酶活性的比较

比较测定了褐飞虱共生菌抗吡虫啉菌株和敏感菌株3种解毒酶活性的变化。结果表明,褐飞虱共生菌不同抗感吡虫啉菌株3种解毒酶活性差异显著（P<0.05）,其中抗吡虫啉菌株的羧酸酯酶、多功能氧化酶活性显著高于敏感菌株,而谷胱甘肽-S-转移酶活性差异不显著。说明褐飞虱共生菌对吡虫啉抗药性的提高,与其体内羧酸酯酶、多功能氧化酶的活性增强有关。

Comparison for activities of detoxifying enzymes in resistant- and susceptible-imidacloprid endosymbiotic strains of rice brown planthopper, Nilaparvata lugens St(a)l

Activities of detoxifying enzymes in resistant- and susceptible-imidacloprid endusymbiotic strains of rice brown planthopper, Nilaparvata lugens were compared. The results showed that resistant- and susceptible-imidacloprid strains had significant difference in activities of detoxifying enzymes, in which, activities of carboxylesterase, mixed function oxidase in resistant-imidacloprid strains were significantly higher than those in susceptible-imidacloprid strains, while activity of glutathione-S-transferase showed no obvious difference between resistant-and susceptible-imidacloprid strains. It was suggested that resistant increasing of N. lugens symbiotes to imidacloprid was related to enhencement of carboxylesterase, mixed function oxidase activities．