聚乙烯微塑料通过根球网络破坏诱导微生物的功能重编程,加速土壤衰退
Weijie Jin1, Yubao Zhang2, Yan Li1
1State Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Lanzhou Eco-Agriculture Experimental Research Station, Lanzhou, 730000, China; Key Laboratory of Stress Physiology and Ecology in Cold and Arid Region, Gansu Province, Lanzhou, 730000, China.
Journal of environmental management
|December 9, 2025
概括
聚乙烯微塑料 (PE-MPs) 通过改变植物根区代谢和微生物群落来破坏土壤健康. 这会影响营养循环,加快土壤退化,强调需要生态恢复战略.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 微生物学 微生物学
背景情况:
- 聚乙烯微塑料 (PE-MPs) 是普遍存在的土壤污染物.
- 它们对树枝球生态系统功能的影响仍然不太清楚.
- 安吉丽卡·辛内斯树作为研究这些效应的示范药用植物.
研究的目的:
- 为了研究PE-MPs对Angelica sinensis的根球生态系统的影响.
- 阐明PE-MPs对植物代谢和微生物群落的影响机制.
- 确定用于土壤生态恢复的生物标志物.
主要方法:
- 使用了非向的代谢学和元基因组测序.
- 部分最小平方路径建模 (PLS-PM) 用于分析复杂的相互作用.
- 评估了对不同PE-MPs度 (250,500,1000 mg/kg) 的树叶球反应.
主要成果:
- 暴露于PE-MPs引起的代谢转移向应激适应和能量重编程.
- 微生物社区结构发生了显著的变化,细菌和病毒多样性增加,但古生物多样性减少.
- 微生物网络的稳定性下降,代谢物与微生物的关联表明植物介导的微生物招募.
- 代谢物变化通过微生物社区的转移,通过细菌作为关键调节者,调节功能性基因表达 (C / N / S / P循环).
- 由PE-MPs引起的压力与土壤质量指数 (SQI) 有负相关性,表明土壤退化.
结论:
- 通过改变植物新陈代谢和微生物群落,PE-MPs显著扰乱了树根球的功能.
- 代谢物-微生物相互作用在微塑性压力下调节营养循环中起着至关重要的作用.
- 细菌和病毒在树叶圈内的信号传递和社区调节中起到关键作用.
- 该研究提供了对微塑料诱导的土壤退化的见解,并提供了恢复的潜在生物标志物.
相关概念视频
Environmental Applications of Microorganisms
911
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
911
Bioremediation
22.0K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
22.0K
Gene Regulation in Microbial Communities: Quorum Sensing
473
Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
473
Biological Methods for Microbial Control
760
Biological agents offer an effective means of controlling microbial growth by leveraging natural processes like predation, competition, and the secretion of antimicrobial substances.Predatory bacteria such as Bdellovibrio species target and kill pathogens like Salmonella and E. coli. They are widely used in poultry farms to control infections. Myxococcus species help combat plant-pathogenic fungi. These naturally occurring predators serve as eco-friendly alternatives to chemical pesticides and...
760


