形式 调节微囊菌对纳米塑料在环境相关度的反应
Mei-Yan Liu1, Xiao-Yu Liu1, Yu-Yu Guo2
1Shandong Key Laboratory of Environmental Processes and Health, School of Environmental Science and Engineering, Shandong University, Qingdao, Shandong 266237, P. R. China.
ACS nano
|April 25, 2024
概括
氨基基基改性纳米塑料对菌生长和微囊素 (MC) 生产的影响因源而异. 这项研究强调了的可用性如何影响水生生态系统中的纳米塑料毒性.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 生态毒理学 生态毒理学
背景情况:
- 菌是影响全球碳和循环的重要初级生产者.
- 纳米塑料对蓝色细菌碳代谢的影响已知,但对代谢的影响尚未研究,特别是在环境度下.
- 了解纳米塑料对蓝藻细菌的影响对于评估淡水生态系统健康至关重要.
研究的目的:
- 为了研究氨基基改性纳米塑料如何影响*Microcystis aeruginosa*在不同形式 (酸盐,,尿素) 下的代谢.
- 根据的可用性来确定纳米塑料的差异性毒性.
- 阐明纳米塑料诱导的蓝藻细菌生长,消耗和微囊合成变化的机制.
主要方法:
- 暴露 *Microcystis aeruginosa* 在 10 微克/毫升的 50 nm 氨基基改性聚烯纳米塑料 (PS-NH2) 中.
- 在酸盐,和尿素的环境相关度下种植.
- 增长抑制,消耗,细胞膜完整性,氧化还原稳定和运输通路的评估.
- 量化微素 (MC) 和细胞外聚合物质 (EPS) 的生产.
主要成果:
- 在酸盐中,PS-NH2的抑制率为51.87%,在尿素中为39.70%,在氨酸中为36.69%.
- 纳米塑料暴露损害了细胞膜完整性,破坏了氧化还原稳态,并影响了不同形式的运输.
- *M. aeruginosa*增加了氨基酸的产生,导致MC,EPS和膜脂的增强合成,以应对纳米塑料.
- 纳米塑料改变了消耗模式,在酸盐,尿素和氨处理之间观察到显著差异.
结论:
- 淡水生态系统中的形式显著调节了纳米塑料对M. aeruginosa等初级生产者的毒性.
- 纳米塑料对蓝菌构成可变的威胁,取决于营养素的可用性和形式.
- 这项研究在现实的环境条件下提供了对纳米塑料生态毒理学风险的关键见解,强调了代谢的作用.
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