02480nam a2200313Ia 4500 MX-MdCICY 20260521091808.0 CICY B-21573 Internalization, physiological responses and molecular mechanisms of lettuce to polystyrene microplastics of different sizes: Validation of simulated soilless culture Journal of Hazardous Materials, 462, p.132710, 2024 Artículo Microplastics (MPs) exists widely in the environment, and the resulting pollution of MPs has become a global environmental problem. Plants can absorb MPs through their roots. However, studies on the mechanism of the effect of root exposure to different size MPs on vegetables are limited. Here, we use Polystyrene (PS) MPs with different particle sizes to investigate the internalization, physiological response and molecular mechanism of lettuce to MPs. MPs may accumulate in large amounts in lettuce roots and migrate to the aboveground part through the vascular bundle, while small particle size MPs (SMPs, 100 nm) have stronger translocation ability than large particle size MPs (LMPs, 500 nm). MPs can cause physiological and biochemical responses and transcriptome changes in lettuce. SMPs and LMPs resulted in reduced biomass (38.27 % and 48.22 % reduction in fresh weight); caused oxidative stress (59.33 % and 47.74 % upregulation of SOD activity in roots) and differential gene expression (605 and 907 DEGs). Signal transduction, membrane transport and alteration of synthetic and metabolic pathways may be the main causes of physiological toxicity of lettuce. Our study provides important information for understanding the behavior and fate of MPs in edible vegetables, especially the physiological toxicity of MPs to edible vegetables, in order to assess the potential threat of MPs to food safety and agricultural sustainable development. MICROPLASTICS HYDROPONIC VEGETABLE ROOT ABSORPTION TRANSCRIPTOMICS OXIDATIVE STRESS Hua, Z. Zhang, T. Luo, J. Bai, H. Ma, S. Qiang, H. Guo, X. https://drive.google.com/file/d/1tX9mhdi2Fg2-XqOuJKUYOve3MN7xYqjk/view?usp=drive_link Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx Loc REF1 250602s9999 xx |||||s2 |||| ||und|d 31581 31581 0 0 Loc 0 0 F1 CICY CICY RE 2025-06-26 0 B-21573 2025-06-26 08:33:35 2025-06-26 REF1