A 3-year field investigation of impacts of Monsanto's transgenic Bt-cotton NC 33B on rhizosphere microbial communities in northern China

文献类型： 外文期刊

第一作者： Xie, Ming

作者： Xie, Ming;Wu, Gang;Peng, De-Liang;Yu, Wen-Bin

作者机构：

关键词： Transgenic crops;Risk assessment;Soil microorganisms

期刊名称：APPLIED SOIL ECOLOGY （ 影响因子：4.046； 五年影响因子：4.884 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Monsanto's Bt-cotton NC 33B, planted in northern China for more than one decade, effectively controls cotton bollworms and decreases the use of chemical insecticides. Because of the concern about undesirable ecological side-effects of transgenic Bt-cottons, it is important to assess Bt-cotton NC 33B's effects on soil microorganisms in this zone. Microbial communities in the rhizosphere soil of Bt and non-Bt cottons were monitored under field conditions by polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE) fingerprints of eubacteria, fungi and actinomycetes at six growth stages after three-year cultivation. Results showed that the population sizes and community structures of eubacteria, fungi and actinomycetes in rhizosphere soil were markedly affected by natural variations in the environment related to cotton growth stages. However, there was no significant difference in eubacterial, fungal and actinomycete population size and community structures in rhizosphere soil between NC 33B and its non-transgenic parent. In general, Bt-cotton NC 33B did not show evident effects on microbial communities in the rhizosphere soil under field conditions after three-year cultivation. This study provides a theoretical basis for environmental impact monitoring of transgenic Bt cottons. (C) 2015 Elsevier B.V. All rights reserved.

分类号： S154.1

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