聚乙烯微塑料诱导光合作用损伤在海体中sp. 在生理和转录基因层面
Xi Li1,2, Zunyan Wang1,2, Yiyong Chen3
1College of Urban and Environmental Sciences, Northwest University, Xi'an 710127, China.
International journal of molecular sciences
|January 11, 2025
概括
氨基聚乙烯微塑料 (PS-NH2) 显著抑制淡水藻类的生长和光合作用. 暴露会损害细胞,改变与光合作用和新陈代谢相关的基因表达,并影响抗氧化酶活性.
科学领域:
- 环境毒理学环境毒理学
- 水生生态学 水生生态学
- 微塑料研究 微塑料研究
背景情况:
- 在水生环境中微塑料度的增加带来了生态风险.
- 微塑料对水生生物群落的影响尚未完全理解.
研究的目的:
- 研究氨基聚乙烯微塑料 (PS-NH2) 对淡水藻类Navicula sp.生理和基因表达的影响.
主要方法:
- 对Navicula sp.的暴露 在不同度的PS-NH2中.
- 评估藻类生长,光合作用参数 (叶绿素含量,Fv/Fm,Qp,NPQ).
- 分析细胞膜完整性,抗氧化酶活性 (MDA,GPX,SOD) 和基因表达 (转录组学,PPI).
主要成果:
- 暴露于PS-NH2抑制了藻类生长和光合作用,降低了叶绿素含量和Fv/Fm.
- 增加PS-NH2度导致细胞膜损伤和抗氧化酶活性升高.
- 转录组分析揭示了与光合作用,新陈代谢和内细胞分裂相关的基因的显著变化,光系统II的关键相互作用.
结论:
- 氨基聚乙烯微塑料在生理和分子层面对淡水藻类产生显著的毒性影响.
- 研究结果提供了对微塑料毒性机制及其对植物浮游生物和水生生态系统的环境影响的见解.
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