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Impact of Insect-Resistant Transgenic Maize 2A-7 on Diversity and Dynamics of Bacterial Communities in Rhizosphere Soil

文献类型： 外文期刊

作者： Xu, Xiaohui 1 ; Liu, Xin 1 ; Li, Fan 1 ; Hao, Chaofeng 1 ; Sun, Hongwei 1 ; Yang, Shuke 1 ; Jiao, Yue 4 ; Lu, Xingbo 1 ;

作者机构： 1.Shandong Acad Agr Sci, Inst Plant Protect, Shandong Key Lab Plant Virol, XX, Jinan 250100, Peoples R China

2.Shandong Normal Univ, Coll Life Sci, Jinan 250014, Peoples R China

3.Minist Agr & Rural Affairs, Dev Ctr Sci & Technol, Beijing 100176, Peoples R China

4.Minist Agr & Rural Affairs, Key Lab Safety Assessment Environm Agr Genet Modif, Jinan 250100, Peoples R China

关键词： insect-resistant transgenic maize; artificially modified Bt protein; bacterial community diversity; rhizosphere soil; risk assessment

期刊名称：PLANTS-BASEL （ 影响因子：4.5； 五年影响因子：4.8 ）

ISSN：

年卷期： 2023 年 12 卷 10 期

页码：

收录情况： SCI

摘要： Artificial modification of Bacillus thuringiensis (Bt) proteins can effectively improve their resistance to target pests, but the effect of such modification on the diversity of rhizosphere microorganisms remains unclear. Transgenic maize 2A-7 contains two artificially modified Bt proteins, mCry1Ab and mCry2Ab. These proteins can enter soil and pose a potential threat to soil microbial diversity. To assess their impacts on rhizosphere bacteria communities, the contents of the two Bt proteins and changes in bacterial community diversity in the rhizosphere soils of transgenic maize 2A-7 and its control variety were analyzed at different growth stages in 2020. The results showed that the two Bt proteins were detected at low levels in the rhizosphere soils of 2A-7 plants. No significant differences in soil bacterial diversity were detected between 2A-7 and its control variety at any of the growth stages. Bioinformatics analysis indicated that the growth stage, rather than the cultivar, was the main factor causing changes in bacterial communities. This research provides valuable data for understanding the impact of Bt crops on the soil microbiome, and establishes a theoretical basis for evaluation of their safety.

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