根际
微塑料
芸苔属
代谢组学
镉
生物利用度
氧化应激
生物累积
生物
环境化学
化学
农学
细菌
生物化学
药理学
生物信息学
遗传学
有机化学
作者
Jianling Wang,Weitao Liu,Xue Wang,Aurang Zeb,Qi Wang,Fan Mo,Ruiying Shi,Jinzheng Liu,Miao Yu,Jiantao Li,Zeqi Zheng,Yuhang Lian
标识
DOI:10.1016/j.scitotenv.2023.167920
摘要
Both microplastics (MPs) and cadmium (Cd) are common contaminants in farmland systems, is crucial for assessing their risks for human health and environment, and little research has focused on stress responses mechanisms of crops exposed to the combined pollution. The present study investigated the impact of polyethylene (PE) and polypropylene (PP) microplastics (MPs), in combination with Cd, on the physiological and metabolomic changes as well as rhizosphere soil of potherb mustard. Elevated levels of PEMPs and PPMPs were found to impede nutrient uptake in plants while promoting premature flowering, and the concomitant effect is lower crop yields. The substantial improvement in Cd bioavailability facilitated by MPs in rhizosphere soil, especially in high concentrations of MPs, then elevated bioavailability of Cd contributed to promoted Cd accumulation in plants, with distinct effects depending on the type and concentration of MPs. The presence of MPs Combined exposure to high concentrations of MPs and Cd resulted in alterations in plant physiology and metabolomics, including decreased biomass and photosynthetic parameters, elevated levels of reactive oxygen species primarily H2O2, increased antioxidant enzyme activities, and modifications in metabolite profiles. Overall, our study assessed the potential impact on food security (the availability of cadmium to plant) and crops stress responses regarding the contamination of MPs and Cd, providing new insights for future risk assessment in agriculture.
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