Environmental Behaviors of Bacillus thuringiensis (Bt) Insecticidal Proteins and Their Effects on Microbial Ecology
文献类型： 外文期刊
作者： Li, Yujie 1 ; Wang, Cui 2 ; Ge, Lei 2 ; Hu, Cong 2 ; Wu, Guogan 2 ; Sun, Yu 2 ; Song, Lili 2 ; Wu, Xiao 2 ; Pan, Aihu 2 ; Xu, Qinqing 4 ; Shi, Jialiang 5 ; Liang, Jingang 6 ; Li, Peng 2 ;
作者机构： 1.Shanghai Ocean Univ, Coll Food Sci & Technol, Shanghai 201306, Peoples R China
2.Shanghai Acad Agr Sci, Biotechnol Res Inst, Shanghai 201106, Peoples R China
3.Shanghai Key Lab Agr Genet & Breeding, Shanghai 201106, Peoples R China
4.Shandong Cty Agr Technol Extens Ctr, Jinan 250003, Peoples R China
5.Dezhou Acad Agr Sci, Dezhou 253000, Peoples R China
6.Minist Agr & Rural Affairs, Dev Ctr Sci & Technol, Beijing 100176, Peoples R China
7.Shanghai Coelite Agr Sci Tech Grp Co Ltd, Shanghai 201106, Peoples R China
关键词： Bt insecticide protein; environmental behaviors; Bt crops; Bt biopesticides; soil microorganisms
期刊名称：PLANTS-BASEL （ 影响因子：4.658； 五年影响因子：4.827 ）
ISSN：
年卷期： 2022 年 11 卷 9 期
页码：
收录情况： SCI
摘要： Bt proteins are crystal proteins produced by Bacillus thuringiensis (Bt) in the early stage of spore formation that exhibit highly specific insecticidal activities. The application of Bt proteins primarily includes Bt transgenic plants and Bt biopesticides. Transgenic crops with insect resistance (via Bt)/herbicide tolerance comprise the largest global area of agricultural planting. After artificial modification, Bt insecticidal proteins expressed from Bt can be released into soils through root exudates, pollen, and plant residues. In addition, the construction of Bt recombinant engineered strains through genetic engineering has become a major focus of Bt biopesticides, and the expressed Bt proteins will also remain in soil environments. Bt proteins expressed and released by Bt transgenic plants and Bt recombinant strains are structurally and functionally quite different from Bt prototoxins naturally expressed by B. thuringiensis in soils. The former can thus be regarded as an environmentally exogenous substance with insecticidal toxicity that may have potential ecological risks. Consequently, biosafety evaluations must be conducted before field tests and production of Bt plants or recombinant strains. This review summarizes the adsorption, retention, and degradation behavior of Bt insecticidal proteins in soils, in addition to their impacts on soil physical and chemical properties along with soil microbial diversity. The review provides a scientific framework for evaluating the environmental biosafety of Bt transgenic plants, Bt transgenic microorganisms, and their expression products. In addition, prospective research targets, research methods, and evaluation methods are highlighted based on current research of Bt proteins.
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