不同尺寸的微塑料和流达皮尔对的联合作用:生物积累,氧化应激,组织病理反应和肠道微生物群
Jingjing Wang1, Lu Lv2, Xuehua An2
1College of Food Science and Engineering, Ningbo University, Ningbo 315800, China.
Environmental pollution (Barking, Essex : 1987)
|December 8, 2024
概括
微塑料 (MPs) 可以携带像Fluindapyr (FIP) 这样的农药,增加对的伤害,特别是较小的MPs. 虽然不会引起肠道失调,但MPs会改变地肠道细菌并增加FIP的毒性.
科学领域:
- 环境毒理学环境毒理学
- 土壤科学 土壤科学
- 生态毒理学 生态毒理学
背景情况:
- 土壤生态系统面临着微塑料 (MP) 和农药的污染.
- 国会议员可以充当农药的载体,可能放大它们对土壤生物的毒性.
- 酸脱基酶抑制剂杀菌剂Fluindapyr (FIP) 对构成潜在的风险,但其与MPs的联合作用尚未得到充分研究.
研究的目的:
- 调查单次和联合暴露于Fluindapyr (FIP) 和微塑料 (MPs) 对地 (Eisenia fetida) 的毒性影响.
- 评估不同大小的聚甲基甲酸盐 (PMMA) 和聚乙烯 (PS) 的MP如何影响FIP积累,消除和虫中的毒性.
- 评估联合FIP和MP暴露对虫肠道微生物群组成的影响.
主要方法:
- 地 (Eisenia fetida) 暴露于PMMA和PS MPs (0.1,1和10微米) 与FIP在28天内.
- 监测了虫中的FIP积累和消除动力学.
- 进行了土组织 (表皮,肠道) 的组织病理学检查和氧化应激标志物的评估.
- 使用16S rRNA测序分析了虫肠道微生物群的变化.
主要成果:
- 联合暴露于0.1和1微米的MPs最初增加了虫中的FIP积累,但在14天后加速了其消除.
- 综合暴露会对的表皮和肠道造成更严重的损伤,并增加氧化应激.
- 联合暴露的毒性影响取决于MP大小,最小的MP (0.1μm) 呈现最强效应.
- 对MPs和FIP的联合暴露没有诱导肠道微生物群失生症.
- 单次接触0.1μm PS MPs显著改变了土虫肠道细菌的多样性,丰富性,以及蛋白质细菌,活性细菌和固体细菌的相对丰富性.
结论:
- 微塑料可以改变Fluindapyr在土壤生态系统中的环境和毒理行为.
- 微塑料的尺寸在调解FIP等共污染物的毒性对虫的毒性方面发挥着至关重要的作用.
- 虽然微塑料不会引起失生症,但可以独立地影响地肠道微生物群落,对土壤健康产生影响.
- 这些发现为对陆地环境中微塑料和农药共同污染的风险评估提供了必要的数据.
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