多组学揭示了复合重金属化物对土壤微生物功能的系统影响:元素循环和微生物适应机制
Qiancheng Zhao1, Caihong Yu1, Xiaoxia Liu2
1School of Chemical & Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China.
Journal of hazardous materials
|September 28, 2025
概括
重金属 (化物) 破坏土壤微生物功能和基因网络. 微生物通过多层次的策略进行适应,包括遗传进化和水平基因转移,增强生物修复潜力.
科学领域:
- 环境微生物学环境微生物学
- 土壤科学 土壤科学
- 基因组学就是基因组学.
背景情况:
- 土壤微生态系统对于营养循环至关重要,但越来越多地受到重金属化物污染.
- 以前的研究重点是社区层面的影响,忽视了基因组反应和微生物适应机制.
研究的目的:
- 从社区到基因组尺度,研究微生物对联合重金属 (化物) 污染的反应.
- 阐明全面的微生物适应策略及其对生物修复的影响.
主要方法:
- 综合多组学 (元基因组学,基因组组,比较基因组学).
- 将多学科数据与实地和实验室研究结合起来.
- 分析了微生物功能基因组合和网络链接.
主要成果:
- 金属化物改变了微生物的功能基因组合,并削弱了营养循环网络 (C,N,P,S).
- 代谢潜力转向甲基生成,脱和硫酸盐减少,而碳水化合物代谢下降.
- 微生物采用了降低吸收,排毒,排泄,增强 siderophore 合成,DNA 修复和基因组简化等策略.
- 通过移动遗传元素进行的横向基因转移被确定为抗性基因获取的关键驱动因素.
结论:
- 结合的重金属 (化物) 对土壤微生物群落的结构和功能在多个尺度上产生重大影响.
- 微生物适应涉及复杂的基因组和生理战略,包括横向基因转移.
- 了解这些适应机制对于评估和增强土壤微生物的生物修复潜力至关重要.
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