在暴露于草甘和微塑料后,氧化应激,植物化学查和对微藻 (Arthrospira platensis) 的抗氧化活性
Dércia Santos1, Edna Cabecinha1, Jesús Gago2
1Centre for the Research and Technology of Agro-Environmental and Biological Sciences, CITAB and Inov4Agro, Institute for Innovation, Capacity Building and Sustainability of Agri-Food Production, University of Trás-os-Montes and Alto Douro, Quinta de Prados, 5000-801 Vila Real, Portugal.
Journal of xenobiotics
|July 23, 2025
概括
混合微塑料 (MP) 和草甘 (GLY) 暴露会损害微藻的抗氧化防御和酶. 这些共同污染的压力因素对水生初级生产者构成风险,影响生态系统和食物网.
科学领域:
- 环境毒理学环境毒理学
- 生态毒理学 生态毒理学
- 水生生态学 水生生态学
背景情况:
- 微塑料 (MP) 毒性与草甘 (GLY) 等农药相结合,在较低的热层水平上是不太了解的.
- 微藻是关键的初级生产者,形成水生食物网的基础.
研究的目的:
- 评估聚乙烯二甲 (PET) 和聚胺 (PA) MPs单独和与GLY一起对微藻 *Arthrospira platensis* 的毒性影响.
- 研究这些联合压力因素对微藻生理学,生物化学和抗氧化剂系统的影响.
主要方法:
- 微藻被暴露在对照剂,GLY,PET,PA及其混合物中12天.
- 测量包括光合作用色素,植物化学物质,抗氧化剂和酶活性 (SOD,CARE,GST).
- 评估了细胞生长,生物量和DPPH清除活动.
主要成果:
- 在第4天,草甘与PA (GLY+PA1) 结合,显著增强了细胞生长 (~80%).
- 到12日,GLY和GLY+PET0.5组的生物量增加.
- 联合暴露改变了酶活性 (增加SOD,CARE;减少GST) 并减少了诸如黄类和胡卜素类的关键抗氧化剂,损害了抗氧化剂防御.
结论:
- 对草甘和MPs的联合暴露显著破坏了A. platensis*的抗氧化防御和酶活性.
- 国会议员可以修改除草剂的毒性,增加微藻生理学的风险,并可能影响初级生产力和营养循环.
- 这些发现突出了对初级生产者的生态风险,以及对水生食物网和生态系统健康的影响.
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