聚乙烯纳米塑料,特布可纳和通过在单次或联合暴露下改变树根球微环境来影响土壤-小麦系统
Bo Zhao1, Fang Chen1, Kexin Zhou1
1School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China; School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China.
Journal of hazardous materials
|September 21, 2024
概括
聚乙烯纳米塑料 (NP) 与杀菌剂和相结合会损害土壤-小麦系统. 核会加剧的毒性,影响植物生长和土壤健康.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 植物生物学 植物生物学
背景情况:
- 微塑料和纳米塑料 (NP) 是新兴的全球污染物.
- 对与其他土壤污染物结合的NP效应的理解有限.
- 聚乙烯 (PE) 是农业薄膜的主要组成部分,引发了对土壤污染的担忧.
研究的目的:
- 研究PE NPs,铁可纳 (Te) 和 (Cd) 对土壤-小麦系统的联合作用.
- 阐明协同作用的毒性和对植物生理学和土壤健康的影响.
- 确定分子机制和微生物在减轻压力的作用.
主要方法:
- 土壤小麦系统对PENP (0.5%),Te (10 mg·kg-1),Cd (4.0 mg·kg-1) 单独和组合的暴露.
- 对营养状况,抗氧化机制和Cd生物可用性的分析.
- 基因表达分析 (KEGG 3级) 和土壤微生物社区分析.
主要成果:
- NP和Te之间的协同毒性影响了土壤小麦的营养状况和抗氧化剂防御.
- NP增加了根Cd度和生物可用性,导致氧化应激并抑制小麦生物质.
- 小麦改变了代谢途径 (碳水化合物,氨基酸,糖) 和基因表达,以维持平衡.
- 促进植物生长的草原细菌 (PGPR) 与环境因素有相关性,这表明它在系统健康方面发挥了作用.
结论:
- 对NP,Te和Cd的联合暴露对土壤-小麦系统构成重大风险.
- 核可以加剧重金属毒性,破坏植物生理过程.
- 分子和微生物反应突出了受污染的土壤中复杂的相互作用和适应机制.
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