微米大小的聚乙烯颗粒和铜对里拉种子发芽的联合作用
Fenghang Sun1, Taojie Feng1,2, Yuxuan Xu1,2
1Joint FAFU-Dalhousie Lab, College of Horticulture, Fujian Agriculture and Forestry University, No.15 Shangxiadian Road, Cangshan District, Fuzhou City, 350002, Fujian Province, China.
Environmental geochemistry and health
|May 2, 2024
概括
微塑料 (MPs) 和铜 (Cu) 的联合污染会对外种子发芽和苗木形态产生负面影响. 低度的MP减轻了部分铜毒性,但高度加剧了对种子发育和生理标记的负面影响.
科学领域:
- 环境科学 环境科学
- 农业科学 农业科学
- 生态毒理学 生态毒理学
背景情况:
- 微塑料 (MP) 和铜 (Cu) 的共同污染在农业环境中很普遍.
- 聚乙烯 (PVC) 是一种常见的微塑料污染物.
- 了解对作物种子的综合污染物影响对于粮食安全至关重要.
研究的目的:
- 调查微塑料 (PVC) 和铜 (Cu) 对花种子发芽和生理反应的联合影响.
- 分析不同度的PVC和Cu如何影响种子发芽潜力,苗木形态和生物化学标记.
- 评估在铜的存在下,微塑料对毒性的潜在缓解或恶化.
主要方法:
- 佩里拉种子暴露在不同度的铜 (Cu) 和聚乙烯 (PVC) 微塑料中.
- 测量了种子发芽参数,包括发芽潜力,发芽指数和生命力指数.
- 生物化学分析包括活性氧物种 (ROS),甲基 (MDA),过氧化 (H2O2) 含量和抗氧化酶活性 (SOD,CAT).
- 观察到发芽种子的形态变化和PVC的根部附着.
主要成果:
- 铜表现出剂量依赖的效果,在低度下促进发芽,在中高度下抑制发芽,同时也恶化了幼苗形态.
- 低度PVC减轻了一些铜诱导的毒性,改善了发芽指标,并减少了PVC对根的附着.
- 高度的PVC加剧了铜的毒性,显著抑制了发芽,并改变了诸如抗氧化酶活性和ROS/MDA水平等生化标志物.
- 联合MPs+Cu污染主要表现为种子发芽形态的严重恶化和氧化应激指标的显著变化.
结论:
- 结合的微塑料和铜污染对危险种子的发芽和早期发展构成重大风险.
- 微塑料和铜之间的相互作用是复杂的,低水平的MP可能会对铜的毒性产生一些保护作用,而高水平则会放大负面影响.
- 这些发现凸显了对农业生态系统中同时存在的污染物的综合风险评估的需要,并提供了对农作物生产生态影响的见解.
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