A Study on the Growth and Physiological Toxicity Effects of the Combined Exposure of Microplastics and Cadmium on the Vicia faba L. Seedlings.

IF 2.7 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Bulletin of Environmental Contamination and Toxicology Pub Date : 2024-06-01 DOI:10.1007/s00128-024-03899-6
Hui Wang, Yaliang Li, Ling Liu, Haitao Liu, Junhong Su, Sheng Xu, Yifan Zhou, Siyu Zhang, Chijing Xu
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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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微塑料和镉联合暴露对紫花苜蓿幼苗生长和生理毒性影响的研究
为了研究聚苯乙烯微塑料(PS-MPs)、镉(Cd)及其联合污染对蚕豆幼苗生长和生理反应的毒理学影响,本实验采用了水培法。以 Hoagland 营养液为对照,观察在不同浓度的 PS-MPs (10、100 毫克/升)单独污染和与 0.5 毫克/升 Cd 混合污染下,蚕豆幼苗根系的生长、生理和生化指标的变化。结果表明,在单独使用 PS-MPs 的影响下,根的生物量、根的活力、超氧自由基(O2--)的生成率、丙二醛(MDA)含量和超氧化物歧化酶(SOD)活性随着浓度的增加而增加,而可溶性糖含量和过氧化物酶(POD)活性则下降。在与镉的联合处理中,这些指标的变化趋势与单独使用 PS-MPs 的处理组基本相似。不过,根系活力和 SOD 活性与 PS-MPs 的浓度呈反比关系。此外,激光共聚焦和电子显微镜扫描显示,在低浓度 PS-MPs 单独处理组和高浓度 PS-MPs 与 Cd 复合处理组中,绿色荧光聚苯乙烯微球进入蚕豆根尖并发生聚集。
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来源期刊
CiteScore
5.60
自引率
3.70%
发文量
230
审稿时长
1.7 months
期刊介绍: The Bulletin of Environmental Contamination and Toxicology(BECT) is a peer-reviewed journal that offers rapid review and publication. Accepted submissions will be presented as clear, concise reports of current research for a readership concerned with environmental contamination and toxicology. Scientific quality and clarity are paramount.
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