在海洋藻中抑制索-4:生理和分子视角
Feifei Yang1, Dexin Kong1, Wenhao Liu1
1Jiangsu Provincial Key Laboratory of Marine Bioresources and Environment/Marine Biotechnology; Jiangsu Institute of Marine Resources Development; Co-Innovation Center of Jiangsu Marine Bio-industry Technology; College of Ocean Engineering, Jiangsu Ocean University, Lianyungang 222005, China.
Ecotoxicology and environmental safety
|September 12, 2024
概括
相-4 (BP-4) 通过抑制生长和破坏细胞过程,损害海洋藻. 这项研究揭示了BP-4的存在.
科学领域:
- 海洋生态毒理学 海洋生态毒理学
- 环境化学环境化学
- 分子生物学分子生物学
背景情况:
- 二-4 (BP-4) 是一种常见的紫外线过器,也是水生生态系统中伪持续性污染物.
- 了解BP-4对海洋初级生产者的生态毒理影响对于生态系统健康至关重要.
- 海洋藻是对环境压力因素敏感的重要初级生产者.
研究的目的:
- 为了研究索-4 (BP-4) 对海洋藻 (Phaeodactylum tricornutum) 的毒性影响.
- 阐明BP-4毒性和藻耐受性背后的分子机制.
- 评估BP-4对生长,光合作用,氧化应激和基因表达的影响.
主要方法:
- 暴露于不同度的BP-4的Phaeodactylum tricornutum的暴露.
- 测量藻类生长速度,光合作用色素含量和光合作用参数.
- 测定抗氧化酶活性和麦隆迪甲酸 (MDA) 水平.
- 转录组测序和差异表达基因 (DEGs) 的分析.
主要成果:
- BP-4显著抑制了藻类生长 (144h-EC50 = 201 mg·L-1),减少了生物质,并破坏了细胞膜完整性.
- MDA水平显著增加,表明氧化应激,在125 mg·L-1 BP-4.4时增加3.57倍.
- 转录组分析显示了1556个DEG,其中包括碳固定和新陈代谢的中断,以及过度的活性氧物种 (ROS) 生产.
- 与色素合成,脂合成和核糖体生物发生有关的基因的升级表明了耐受性反应.
结论:
- BP-4对Phaeodactylum tricornutum具有显著的毒性,影响生长和生理功能.
- 破坏碳代谢和增加氧化应激是BP-4毒性的关键机制.
- 藻具有涉及与光合作用和细胞修复相关的基因表达的耐受性机制.
- 结果提供了对BP-4生态毒性和对受污染水生环境的潜在生物修复策略的见解.
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