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三酸 (TPHP) 对微囊气球菌的影响:生长刺激和适应性机制

Mengyuan Mei¹, Lin Deng¹, Zihan Lin¹

¹State Key Laboratory of Water Pollution Control and Green Resource Recycling, School of the Environment, Nanjing University, Nanjing 210023, China.

Journal of hazardous materials

|July 18, 2025

概括

在Microcystis aeruginosa中暴露于酸三 (TPHP) 显示了双重效应:它在较高剂量时刺激生长和光合作用,但也会诱导应激反应. 这会影响水生生态系统和有害的藻类繁殖风险.

科学领域:

环境毒理学环境毒理学
水生生态毒理学水生生态毒理学
微生物学微生物学

背景情况:

像三酸 (TPHP) 这样的有机酸盐阻燃剂 (OPFR) 是常见的水生污染物.
与鱼类相比,关于TPHP对微藻,关键的初级生产者的影响的研究是有限的.
了解TPHP对*Microcystis aeruginosa*的影响对于水生生态平衡至关重要.

研究的目的:

为了研究TPHP对*Microcystis aeruginosa*的剂量依赖性影响.
为了阐明M. aeruginosa对TPHP暴露的生理和分子反应.
为了评估TPHP的降解,吸附和积累,M. aeruginosa.

主要方法:

暴露于不同TPHP度 (0.1-2毫克/升) 的 *M. aeruginosa*.
综合生理分析,稳定同位素 (C) 测试,转录组学和微囊素-LR (MC-LR) 分析.
对TPHP度分布的分析 (降解,吸附,细胞内积累).

主要成果:

暴露于TPHP导致藻类介导的降解 (26-63%) 和显著的细胞表面吸附 (28-35%) 和细胞内积累 (30-51%).
在引起膜变化的同时,TPHP保持了藻类生长和光合作用;高剂量 (1-2 mg/L) 通过调节关键代谢途径来增强这些过程.
*M. aeruginosa*激活了防御机制,包括细胞外蛋白和MC-LR的产生,以及在EPS中丰富.

结论:

TPHP表现出双重作用,同时作为一种代谢刺激剂和对M. aeruginosa*的有毒压力因素.
TPHP可以改变藻类社区的动态,并可能增加有害藻类繁殖的风险.
这些发现为OPFR在水生环境中的风险评估提供了关键的见解.

关键词:

微囊素LR-LR的使用情况微囊气球菌的微囊.它是稳定的同位素.转录组转录组就是一个转录组.三烯酸三烯酸是什么

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