围困下的绿色:聚乙烯瓜尼丁消毒剂如何攻击水生生态系统中的微藻类
Kai Zhang1, Ziqin Wei2, Yixuan Wang3
1Nanjing Jiangning District Water Affairs Bureau, Nanjing, China.
PeerJ
|June 16, 2025
概括
聚乙烯瓜尼丁 (PHMG) 伤害水生微藻类,如Chlorella vulgaris,影响生长和光合作用. 这种消毒污染对水生生态系统构成威胁,迫切需要采取缓解策略.
科学领域:
- 环境科学 环境科学
- 水生毒理学 水生毒理学
- 微生物学 微生物学
背景情况:
- 聚乙烯瓜尼丁 (PHMG) 是一种广泛使用的消毒剂,可能对水生生态系统产生不利影响.
- 微藻是水生环境中至关重要的初级生产者,对化学污染物敏感.
研究的目的:
- 研究PHMG暴露对模型藻类Chlorella vulgaris生长,光合作用,代谢副产品和抗氧化防御的影响.
- 阐明PHMG影响微藻生理和生物质生产的机制.
主要方法:
- 菌暴露于PHMG的不同度.
- 评估生长速度,叶绿素含量,光系统II效率和光合作用活动.
- 对抗氧化酶活动和压力生物标志物的分析.
- 应用结构方程建模 (SEM) 来确定因果关系.
主要成果:
- 暴露于PHMG诱导了一个类似于激素的反应,在较高度下抑制了生长.
- 观察到叶绿素含量,光系统II效率和光合作用活性显著降低.
- 藻类表现出增加的抗氧化酶活动和压力生物标志物作为防御机制.
- SEM分析证实,PHMG主要破坏光合作用装置,导致下游代谢和抗氧化作用,减少生物质.
结论:
- PHMG对微藻种群和水生生态系统健康构成重大威胁.
- 光合作用装置的破坏是Chlorella vulgaris中PHMG毒性的关键机制.
- 迫切需要采取缓解措施,以应对与消毒污染有关的环境风险.
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