在暴露于Hg(II) 压力时,Isochrysis galbana微藻的生理和转录组反应
Linlin Zhang1, Na Li1, Xinfeng Xiao2
1College of Safety and Environment Engineering, Shandong University of Science and Technology, Qingdao, 266510, China.
World journal of microbiology & biotechnology
|May 4, 2025
概括
(Hg) 污染抑制了海洋藻类Isochrysis galbana的生长. 这项研究揭示了Hg(II) 破坏了关键的细胞过程,导致水生初级生产者的生长抑制和亡.
科学领域:
- 环境毒理学环境毒理学
- 海洋生物学 海洋生物学
- 生物化学 生物化学
背景情况:
- 重金属污染,特别是 (Hg),对水生生态系统构成重大风险.
- 植物浮游生物等初级生产者对于海洋食物网和生态系统健康至关重要.
研究的目的:
- 研究 (II) (Hg) (II)) 对海洋藻Isochrysis galbana的生长,生理和细胞完整性的影响.
- 为了阐明Hg(II) 毒性和解毒的机制,在一个关键的水生初级生产者.
主要方法:
- 暴露伊索克里西斯加尔巴纳不同度的Hg.
- 评估生长,叶绿素a,可溶性蛋白质和抗氧化酶活动 (SOD,CAT,POD).
- 超结构分析,X射线光电子光谱 (XPS) 和转录组分析.
主要成果:
- 度高于0.2mg/L显著抑制了I. galbana的生长.
- 较低的Hg (II) 水平增强了抗氧化酶的活性,而较高的水平则诱导了亡 (染色质凝结,细胞分裂).
- Hg(II) 破坏了与光合作用,TCA循环和DNA复制相关的基因,表明了广泛的代谢干扰.
结论:
- (II) 在Isochrysis galbana中通过破坏重要的代谢途径和诱导编程细胞死亡来发挥毒性.
- 排毒包括与细胞表面和细胞内宏分子结合,有可能形成Hg3(PO4) 2或HgO.
- 这些发现凸显了水产原生产品对污染及其生态影响的脆弱性.
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