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Consumption of Bt Maize Pollen Containing Cry1Ie Does Not Negatively Affect Propylea japonica (Thunberg) (Coleoptera: Coccinellidae)

文献类型： 外文期刊

作者： Li, Yonghui 2 ; Liu, Yanmin 2 ; Yin, Xinming 1 ; Romeis, Joerg 2 ; Song, Xinyuan; Chen, Xiuping 2 ; Geng, Lili 2 ; Pen 1 ;

作者机构： 1.Henan Agr Univ, Coll Plant Protect, Zhengzhou 450002, Peoples R China

2.Chinese Acad Agr Sci, Inst Plant Protect, State Key Lab Biol Plant Dis & Insect Pests, Beijing 100193, Peoples R China

3.Agroscope Biosafety Res Grp, CH-8046 Zuric

关键词： Bt maize;Cry1Ie;non-target effects;ladybirds;environmental risk assessment

期刊名称：TOXINS （ 影响因子：4.546； 五年影响因子：4.8 ）

ISSN： 2072-6651

年卷期： 2017 年 9 卷 3 期

页码：

收录情况： SCI

摘要： Propylea japonica (Thunberg) (Coleoptera: Coccinellidae) are prevalent predators and pollen feeders in East Asian maize fields. They are therefore indirectly (via prey) and directly (via pollen) exposed to Cry proteins within Bt-transgenic maize fields. The effects of Cry1Ie-producing transgenic maize pollen on the fitness of P. japonica was assessed using two dietary-exposure experiments in the laboratory. In the first experiment, survival, larval developmental time, adult fresh weight, and fecundity did not differ between ladybirds consuming Bt or non-Bt maize pollen. In the second experiment, none of the tested lethal and sublethal parameters of P. japonica were negatively affected when fed a rapeseed pollen-based diet containing Cry1Ie protein at 200 g/g dry weight of diet. In contrast, the larval developmental time, adult fresh weight, and fecundity of P. japonica were significantly adversely affected when fed diet containing the positive control compound E-64. In both experiments, the bioactivity of the Cry1Ie protein in the food sources was confirmed by bioassays with a Cry1Ie-sensitive lepidopteran species. These results indicated that P. japonica are not affected by the consumption of Cry1Ie-expressing maize pollen and are not sensitive to the Cry1Ie protein, suggesting that the growing of Bt maize expressing Cry1Ie protein will pose a negligible risk to P. japonica.

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