微塑料的衰老调解了塑料圈中的细菌和抗生素耐药性基因组成,以及相关的土壤溶液
Yanyu Bao1, Guancheng Liu1, Hanyu Yao1
1Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education) / Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin, 300350, PR China.
Environmental pollution (Barking, Essex : 1987)
|September 19, 2025
概括
微塑料 (MP) 和抗生素耐药性基因 (ARG) 在土壤中同时存在. 老年MP改变细菌群落,促进ARG在塑层与土壤溶液中的传播方式不同,水平基因转移是关键驱动因素.
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:
- 微塑料 (MP) 和抗生素耐药性基因 (ARG) 是普遍存在的土壤污染物.
- 现有的研究强调了MP对土壤微生物和ARG的影响,但缺乏对息地特定变异 (塑层与土壤溶液) 和老化影响的明确性.
研究的目的:
- 调查老年MP对塑圈和周围土壤溶液中的微生物和抗生素耐药性的影响.
- 阐明受MP老化和息地影响的ARG传播的差异化过程和驱动机制.
主要方法:
- 通过使用老年受治疗的国会议员进行了微观实验.
- 在塑圈和土壤溶液中分析了细菌社区组成,ARG和共发生网络.
- 使用变异分区分析来确定通过移动遗传元素 (MGE) 进行横向基因转移的贡献.
主要成果:
- 不同程度的老化MP改变了细菌社区结构,塑层显示出独特的细菌丰富,特别是7天老的MP.
- MP老龄化促进了ARG传播,息地,ARG类型和老龄化程度影响了其程度.
- 蛋白质细菌被MPs持续丰富,特别是老年人,促进ARG传播,主要的ARG宿主转移到塑层.
- 种群层面的宿主,细菌功能和通路在ARG传播中发挥了作用,在土壤溶液中的影响比塑球更大.
- 通过MGEs进行的水平基因转移是这两种息地ARG传播的重要贡献者 (54-78%).
结论:
- 肥胖的老化对土壤细菌群落和ARG传播模式产生重大影响.
- 在MP如何影响微生物群落和ARG传播方面存在息地特定的差异.
- 横向基因转移是推动ARG在MP污染土壤中的传播的关键机制.
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