Uptake and effect of carboxyl-modified polystyrene microplastics on cotton plants

文献类型： 外文期刊

第一作者： Li, Wei

作者： Li, Wei;Zhao, Junjie;Zhang, Zhiqiang;Ren, Zhongying;Ma, Xiongfeng;Li, Wei;Zhao, Junjie;Zhang, Zhiqiang;Ren, Zhongying;Li, Xinyang;Ma, Xiongfeng;Li, Wei;Zhao, Junjie;Ma, Xiongfeng;Zhang, Ruoyu

作者机构：

关键词： Microplastics; Cotton; Oxidative stress; Phenylpropanoid biosynthesis pathway; Sucrose catabolism

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：13.6； 五年影响因子：12.7 ）

ISSN： 0304-3894

年卷期： 2024 年 466 卷

页码：

收录情况： SCI

摘要： Microplastics (MPs) have emerged as a significant global environmental concern, particularly within agricultural soil systems. The extensive use of plastic film mulching in cotton cultivation has led to the alarming presence of MP pollution in cotton fields. However, the uptake and effects of MPs on the growth of cotton plants are poorly understood. In this study, we conducted a comprehensive analysis of hydroponically cultured cotton seedlings at the phenotypic, transcriptional, and metabolic levels after exposure to carboxyl-modified polystyrene microplastics (PS-COOH). Treatment with three concentrations of PS-COOH (100, 300, and 500 mg/L) resulted in notable growth inhibition of treated plants and exhibited a dose-dependent effect. And, PS-COOH can invade cotton roots and be absorbed through the intercellular spaces via apoplastic uptake, with accumulation commensurate with treatment duration. Transcriptomic analysis showed significant up -regulation of genes associated with antioxidant activity in response to 300 mg/L PS-COOH treatment, suggesting the induction of oxidative stress. In addition, the PS-COOH treatment activated the phenylpropanoid biosynthesis pathway, leading to lignin and flavonoid accumulation, and altered sucrose catabolism. These findings illustrate the absorption and effects of MPs on cotton seedlings and offer valuable insights into the potential toxicity of MPs to plants in soil mulched with plastic film.

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