Abstract
To investigate the toxicological effects of polystyrene microplastics (PS-MPs), cadmium (Cd), and their combined contamination on the growth and physiological responses of V. faba seedlings, this experiment employed a hydroponic method. The Hoagland nutrient solution served as the control, changes in root growth, physiological and biochemical indicators of V. faba seedlings under different concentrations of PS-MPs (10, 100 mg/L) alone and combined with 0.5 mg/L Cd. The results demonstrated that the root biomass, root vitality, generation rate of superoxide radicals (O2·−), malondialdehyde (MDA) content, and superoxide dismutase (SOD) activity increased with increasing concentration under the influence of PS-MPs alone, while the soluble sugar content and peroxidase (POD) activity decreased. In the combined treatment with Cd, the trends of these indicators are generally similar to the PS-MPs alone treatment group. However, root vitality and SOD activity showed an inverse relationship with the concentration of PS-MPs. Furthermore, laser confocal and electron microscopy scanning revealed that the green fluorescent polystyrene microspheres entered the root tips of the V. faba and underwent agglomeration in the treatment group with a low concentration of PS-MPs alone and a high concentration of composite PS-MPs with Cd.
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Funding
This work was funded by Projects of Education Department of Anhui Province (KJ2020A0649), and Projects of Huainan Normal University (2023XJZD020, 2023XJYB035).
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Hui Wang: Writing-original draft, Methodology. Yaliang Li: Writing-original draft, Formal analysis. Ling Liu: Supervision, Writing-review & editing. Haitao Liu: Funding acquisition, Conceptualization. Junhong Su: Methodology, Visualization. Sheng Xu: Formal analysis, Investigation. Yifan Zhou: Prepared plant materials. Siyu Zhang: Investigation. Chi**g Xu: Investigation.
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Wang, H., Li, Y., Liu, L. et al. A Study on the Growth and Physiological Toxicity Effects of the Combined Exposure of Microplastics and Cadmium on the Vicia faba L. Seedlings. Bull Environ Contam Toxicol 112, 83 (2024). https://doi.org/10.1007/s00128-024-03899-6
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DOI: https://doi.org/10.1007/s00128-024-03899-6