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根排泄物和PFOS流动性之间的相互作用:影响湿地生态系统中的根球微生物健康

Bianhe Lu¹, Peifang Wang¹, Yueming Zhu²

¹Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing, 210098, China; College of Environment, Hohai University, Nanjing, 210098, China.

Environmental pollution (Barking, Essex : 1987)

|November 18, 2024

概括

perfluorooctanesulfonate (PFOS) 对湿地土壤微生物的影响因植物而异. 莱斯沙利卡里亚根排泄物加剧了PFOS毒性,而弗拉格米特斯社区的排泄物提供了保护.

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:

perfluorooctanesulfonate (PFOS) 是一种持久性有机污染物,具有已知的生态风险.
草地微生物群落对于湿地生态系统的健康至关重要.
了解污染物压力下的植物微生物相互作用对于生态风险评估至关重要.

研究的目的:

研究PFOS对Lythrum salicaria (LS) 和Phragmites communis (PC) 的根球微生物群落的影响.
确定植物根排泄物在调节PFOS流动性和毒性的作用.
阐明植物对PFOS污染的具体防御策略.

主要方法:

建立了微观实验,使用不同的PFOS度.
用流动细胞计和土壤呼吸来评估土壤微生物生理状态.
使用薄层染色学分析了PFOS的流动性.
根排泄物组成通过里埃变换红外光谱和激发发射矩阵光光谱分析.

主要成果:

暴露于PFOS增加了微生物死亡率,LS和PC根球之间存在显著差异.
通过减少移动性,LS根排泄物增加了PFOS局部度和微生物毒性.
PC根排泄物增强了PFOS的流动性,从而减轻了对根球微生物的毒性.
PFOS应激诱导了LS和PC根排泄物中明显的组成变化,表明了不同的防御机制.

结论:

植物根排泄物在调解PFOS在湿地土壤中的生态影响方面发挥着关键作用.
莱斯沙利卡里亚和弗拉格米特斯共产体在通过其根排泄物来管理PFOS污染方面表现出截然不同的策略.
植物与微生物的相互作用和根排泄物成分是影响微生物对PFOS污染的抗性的主要因素.

关键词:

流动细胞计量流动细胞计量这种植物是Lythrum salicaria.弗拉格米特斯·科蒙尼斯 (Phragmites communis) 是一个共产主义者.土壤呼吸系统土壤呼吸系统薄层色谱学薄层色谱学

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