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微塑料增强了pyrogallol对有毒Microcystis的等位变异,并带来了额外的风险:Microcystins释放和温室气体排放

Linqing Du¹, Qinglong Liu¹, Lan Wang¹

¹Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.

The Science of the total environment

|June 15, 2024

概括

微塑料 (MPs) 和高醇 (PYR) 组合加剧了蓝藻细菌的繁殖,增加了有害毒素和温室气体排放. 这种协同效应在淡水生态系统中带来了重大生态风险.

科学领域:

环境科学环境科学
生态毒理学生态毒理学
微生物学微生物学

背景情况:

蓝藻细菌 (CBs) 的繁殖,特别是来自Microcystis aeruginosa (M. aeruginosa),是全球关注的问题,原因是缩和释放像微囊 (MCs) 这样的毒素.
微塑料 (MPs) 对淡水环境中的等位基相互作用的影响仍然不太清楚.

研究的目的:

调查聚烯微塑料 (PS-MPs) 和高醇 (PYR) 对M. aeruginosa.的等位病变的联合作用.
评估PS-MPs和PYR对M. aeruginosa生长,光合作用,微囊素生产和温室气体 (GHG) 排放的影响.

主要方法:

用PS-MP和PYR的两个度 (2和8毫克/升) 来试验M. aeruginosa的化.
测量细胞密度,叶绿素-a含量,细胞内和细胞外MC,以及温室气体排放率 (CO2,N2O,CH4).
转录组分析以确定与细胞过程和毒素/GHG通路相关的基因表达变化.

主要成果:

PS-MP加剧了PYR对M. aeruginosa生长和光合作用的抑制作用,显著降低了细胞密度和甲酸含量.
存在PS-MPs导致细胞内 (3.49倍) 和细胞外 (1.10倍) MCs的实质性增加.
随着PS-MP的添加,CO2 (2.66倍),N2O (2.23倍) 和CH4 (2.17倍) 排放的显著增加被观察到.
转录组分析揭示了参与DNA合成,膜功能,MCs释放和GHG排放的基因失调.

结论:

PS-MPs与PYR具有协同作用,加剧了抑制M. aeruginosa的生长和光合作用.
这种协同作用导致与微囊素释放量增加和温室气体排放量增加相关的风险增加.
这些发现强调了微塑料和化学污染物在淡水生态系统的相互作用所带来的复杂的生态风险,影响了藻类繁殖动态.

关键词:

一种类基因异位症 (Allelopathy).温室气体温室气体是一种温室气体.微囊是一种微囊.微塑料是一种微塑料.有协同效应的效应.

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