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Bt毒素会改变细菌群落及其在肠中的潜在功能

Luyao Wang¹, Yixuan Fan¹, Lingli Zou¹

¹College of Fisheries and Life Science, Shanghai Ocean University, Shanghai, 201306, China; Biotechnology Research Institute, Shanghai Academy of Agricultural Sciences, Key Laboratory for Safety Assessment (Environment) of Agricultural Genetically Modified Organisms, Ministry of Agriculture and Rural Affairs, China; Shanghai Key Laboratory of Agricultural Genetics and Breeding, Shanghai Professional Technology Service Platform of Agricultural Biosafety Evaluation and Testing, Shanghai, 201106, China.

Environmental pollution (Barking, Essex : 1987)

|December 26, 2024

概括

土壤中的Bt毒素可能会带来生态风险. 这项研究发现,地肠道细菌可以降解Bt毒素,显示出对这些化合物的弹性和适应性.

科学领域:

环境科学环境科学
微生物学微生物学
生态毒理学生态毒理学

背景情况:

突菌 (Bt) 毒素在Bt作物和生物杀虫剂的土壤中积累,引发了生态问题.
虫是关键的土壤生物指标,但Bt毒素对它们的肠道微生物组的影响还未得到充分研究.
了解这些影响对于评估土壤生态风险至关重要.

研究的目的:

研究土肠道内的Bt毒素动态.
评估Bt毒素对虫肠道细菌群体多样性,稳定性和功能的影响.
确定土虫肠道微生物组对Bt毒素暴露的弹性和适应能力.

主要方法:

暴露于不同度的Bt毒素的地.
随着时间的推移,对虫肠道中Bt毒素度的分析.
使用测序来描述肠道细菌群体的组成,多样性 (Sobs,ACE指数) 和预测的功能.
评估微生物酶活动和功能冗余.

主要成果:

在虫肠道中的Bt毒素度随着化时间显著下降.
暴露于Bt毒素改变了细菌群体的组成,减少了α多样性并增加了预测的微生物酶丰度.
细菌种群通过,和多糖水解路径参与Bt毒素降解.
尽管14天后多样性和稳定性初步下降,但21天后这些恢复正常.

结论:

虫肠道微生物群体表现出强大的弹性和适应Bt毒素压力的适应能力.
细菌种类通过特定的代谢途径在排毒Bt毒素中发挥作用.
暴露后没有观察到Bt毒素对虫肠道微生物群的持续不良影响.

关键词:

16S rRNA 基因测序的基因测序细菌社区的细菌社区 Bt毒素是一种毒素.地虫的肠道是什么?生态风险生态风险

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