聚乙烯微塑料对土虫中tebuconazole生物积累,氧化应激和肠道细菌群体的影响
Xiaoqian Qiu1, Diwen Yang1, Leixin Yu2
1College of Land and Environment, Shenyang Agricultural University, Shenyang 110866, China.
Journal of hazardous materials
|October 15, 2024
概括
较小的聚乙烯微塑料 (PE-MPs) 会增加虫杀菌剂的积累和毒性,导致氧化应激并改变肠道细菌. 这凸显了土壤中微塑料污染对环境的风险.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 土壤科学 土壤科学
背景情况:
- 聚乙烯微塑料 (PE-MP) 和杀菌剂在农业土壤中共存.
- 不同的PE-MP大小和度对杀剂污染环境中的土壤生物的综合毒性影响尚不清楚.
研究的目的:
- 调查不同PE-MP大小 (13,48,150微米) 和度 (0.05%,0.25%) 对土中tebuconazole积累,氧化应激和肠道细菌的影响.
- 评估PE-MPs和杀菌剂对虫健康和基因表达的联合毒性.
主要方法:
- 虫暴露于单独的铁布可纳和与不同大小和度的PE-MPs结合.
- 分析了特布可纳的积累,氧化应激生物标志物 (甲酸酶,过氧化酶),基因表达 (氨酸硫转移酶,热冲击蛋白70,转化控制的瘤蛋白),肠表皮损伤和肠道细菌社区结构.
主要成果:
- 暴露于最小PE-MPs (13微米) 的地显示出最高的tebuconazole积累和严重的氧化应激.
- 基因表达分析表明,在最小的PE-MP组中,DNA损伤和毒性增加,而较大的PE-MP (150微米) 则导致显著的肠损伤.
- PE-MPs改变了肠道细菌群体,增加了与氧化应激相关的细菌的丰富性.
结论:
- PE-MPs影响真菌杀菌剂的生物可用性和地的吸收,加剧了毒性.
- 微塑料污染会诱导氧化应激,改变与DNA损伤和防御机制相关的基因表达,并破坏虫的肠道微生物群.
- PE-MPs的大小在观察到的毒性影响中起着关键作用,较小的颗粒构成更大的风险.
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