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Botanical Research 2025
不同大小微塑料与草甘膦单一及联合胁迫对紫萍的影响
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Abstract:
微塑料污染对生态系统和人类健康具有一定影响，已成为世界上最严重的环境问题之一。近年来，微塑料对植物生长和发育的影响受到了广泛关注。其不仅可以对植物形成直接胁迫，还可以通过吸附其他有机或无机污染物，形成联合污染。本研究主要探索了不同大小、微塑料分别与草甘膦联合胁迫对漂浮植物紫萍的生态毒性效应。实验结果表明：草甘膦显著减少了紫萍根的数目，PS及其大小对紫萍的根的数目并无显著影响；维生素C，可溶性糖，可溶性蛋白，SOD和APX活性进一步提高，大大降低了草甘膦带来的抑制作用，微米塑料诱导SOD和POD活性的增加，而纳米塑料则主要诱导POD和APX活性的增加。
Microplastic pollution has a certain impact on ecosystems and human health, and has become one of the most serious environmental problems in the world. In recent years, the impact of microplastics on plant growth and development has received widespread attention. It can not only directly stress plants, but also form joint pollution by adsorbing other organic or inorganic pollutants. This study mainly explored the ecological toxicity effects of different sizes and microplastics combined with glyphosate stress on floating plant purple duckweed. The experimental results showed that glyphosate significantly reduced the number of purple duckweed roots, while PS and its size had no significant effect on the number of purple duckweed roots; Vitamin C, soluble sugars, soluble proteins, SOD and APX activities were further increased, greatly reducing the inhibitory effect of glyphosate. Microplastics induced an increase in SOD and POD activities, while nanoplastics mainly induced an increase in POD and APX activities.
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