评估微塑料和酸雨对幼苗中毒性的相互作用影响:从生理学和转录基因分析的见解
Jiefen Xie1, Shaoyan Zheng2, Hui Wei3
1Department of Ecology, College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China; Guangdong Laboratory for Lingnan Modern Agriculture, Key Laboratory of Agro-Environment in the Tropics, Ministry of Agriculture and Rural Affairs, South China Agricultural University, Guangzhou 510642, China.
The Science of the total environment
|August 18, 2024
概括
微塑料和酸雨的联合暴露可以减轻高度的水幼苗中的毒性. 这种相互作用影响植物生长,氧化应激和积累,为重金属污染的农业地区提供了洞察力.
科学领域:
- 环境科学 环境科学
- 植物生物学 植物生物学
- 毒理学 毒理学 毒理学
背景情况:
- 重金属污染,微塑料污染和酸雨威胁到粮食安全.
- 微塑料 (MP) 和酸雨 (AR) 对大米中 (Cd) 毒性的联合影响尚不清楚.
研究的目的:
- 调查MP和AR对米苗中Cd毒性的联合影响.
- 为了阐明Cd在同时暴露下减轻毒性的潜在机制.
主要方法:
- 米苗暴露于聚乙烯微塑料,酸雨 (pH4.0),以及不同度的Cd (0.3,3,10 mg/L).
- 评估了幼苗的生长,叶绿素含量,活性氧物种 (ROS),麦隆迪甲 (MDA),超氧化物失调酶 (SOD) 活性,根细胞损伤和Cd积累.
- 进行了转录组分析,以确定基因表达变化.
主要成果:
- 同时暴露于MP和AR缓解了高Cd度 (10毫克/升) 的Cd压力,改善了生长和叶绿素含量.
- 在高Cd下,MP和AR显著降低了ROS,MDA和SOD活性,减轻了氧化应激.
- 与单次暴露相比,联合MP和AR暴露减少了根细胞损伤和Cd积累.
结论:
- 同时暴露于MP和AR会影响大米中的Cd毒性,特别是在高Cd条件下减轻Cd毒性.
- 这种相互作用通过改变基因表达影响了Cd运输,氧化应激和谷氨代谢.
- 这些发现为评估重金属污染地区对作物的污染影响和确保农业安全提供了基础.
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