Bt cotton expressing CrylAc/Cry2Ab or CrylAc/epsps does not harm the predator Propylaea japonica through its prey Aphis gossypii

文献类型： 外文期刊

第一作者： Yao Zhao

作者： Yao Zhao;Yan Ma;Lin Niu;Weihua Ma;Amani Mannakkara;Lizhen Chen;Chaoliang Lei

作者机构：

关键词： Bt cotton;Aphis gossypii;Propylaea japonica;Cry1Ac

期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 影响因子：5.567； 五年影响因子：6.064 ）

ISSN： 0167-8809

年卷期： 2013 年 179 卷

页码：

收录情况： SCI

摘要： To assess the ecological effects of Bt-cotton cultivars (ZMSJ and ZMKCKC, expressing CrylAc/Cry2Ab and CrylAc/EPSPS, respectively), laboratory experiments were performed to evaluate the transmission of CrylAc protein in the food chain and the effects of Bt toxin on the ladybeetle predator Propylaea japonica through its herbivorous prey Aphis gossypii. Trace amounts of CrylAc protein (3.0 ng/g fresh mass [FM] in ZMSJ, 3.8 ng/g FM in ZMKCKC) were detected in A. gossypii feeding on Bt cotton cultivars. Cry1Ac protein was also detected in ladybeetles preying on Bt-fed aphids, and its quantity increased as the adult period extended (5-20 d). However, there were no distinct differences in the total developmental mortality, newly emerged adult weights, or fecundity between predators fed Bt-fed or Bt-free aphids. A delay in development was observed when P. japonica was fed A. gossypii reared on both Bt cottons. The preoviposition period was significantly longer in the ZMSJ ladybeetles than in the control ladybeetles. These results suggest that the Cryl Ac protein expressed in these transgenic cotton plants can be transmitted to predators through their herbivorous prey, but they do not affect their biology. (C) 2013 Elsevier B.V. All rights reserved.

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