Li Chengtao, Cao Wen, Wu Wanqing, Xin Xiwei, Jia Honglei
College of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China.
College of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, China.
J Hazard Mater. 2025 Mar 15;486:136968. doi: 10.1016/j.jhazmat.2024.136968. Epub 2024 Dec 24.
Biodegradable plastics, regarded as an ideal substitute for traditional plastics, are increasingly utilized across various industries. However, due to their unique degradation properties, they can generate microplastics (MPs) at a faster rate, potentially posing a threat to plant development. This study employed transcriptomics and metabolomics to investigate the effects of polylactic acid microplastics (PLA-MPs) on the physiological and biochemical characteristics of Brassica chinensis L. over different periods. The findings indicated that exposure to varying concentrations of PLA-MPs had distinct influences on the growth and development of Brassica chinensis L. Transcriptomic analysis showed different concentrations of PLA-MPs directly influenced the expression of genes associated with plant hormones, such as SnRK2 and BnaA01g27170D. In addition, it was observed that these PLA-MPs also impacted plant growth and development by modulating the expression of other genes, eg. related to sulfur metabolism and glycerophosphate metabolism. Metabolomic analysis demonstrated alterations levels of metabolites such as L-glutamine, and arginine in response to PLA-MPs, which influenced pathways related to vitamin B6 metabolism, the one-carbon folate pool, glycerophospholipid metabolism, and cysteine. This study offers new insights into the potential impacts of biodegradable microplastics (BMPs) on plants and underscores the need for further investigation into the potentially more significant effects of BMPs on terrestrial ecosystems.
生物可降解塑料被视为传统塑料的理想替代品，在各个行业中的应用日益广泛。然而，由于其独特的降解特性，它们能够更快地产生微塑料（MPs），这可能对植物发育构成威胁。本研究采用转录组学和代谢组学方法，研究了聚乳酸微塑料（PLA-MPs）在不同时期对小白菜生理生化特性的影响。研究结果表明，暴露于不同浓度的PLA-MPs对小白菜的生长发育有不同影响。转录组分析显示，不同浓度的PLA-MPs直接影响与植物激素相关基因的表达，如SnRK2和BnaA01g27170D。此外，观察到这些PLA-MPs还通过调节其他基因的表达影响植物生长发育，例如与硫代谢和甘油磷酸代谢相关的基因。代谢组分析表明，响应PLA-MPs时，L-谷氨酰胺和精氨酸等代谢物水平发生变化，这影响了与维生素B6代谢、一碳叶酸池、甘油磷脂代谢和半胱氨酸相关的途径。本研究为生物可降解微塑料（BMPs）对植物的潜在影响提供了新的见解，并强调有必要进一步研究BMPs对陆地生态系统可能产生的更重大影响。
