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Effects of micro- and nano-plastics on accumulation and toxicity of pyrene in water spinach (Ipomoea aquatica Forsk)

Environmental Science and Pollution Research 2022 17 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 45 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Yang Liu Yang Liu Yang Liu Yang Liu Yang Liu Yang Liu Yang Liu Guanghui Xu, Guanghui Xu, Guanghui Xu, Guanghui Xu, Yang Liu Yang Liu Yang Liu Guanghui Xu, Yang Liu Yang Liu Yang Liu Yang Liu Yang Liu Yang Liu Yang Liu Yang Liu Tong Ren, Guanghui Xu, Guanghui Xu, Honghui Teng, Yang Liu Guanghui Xu, Yang Liu Yong Yu, Yang Liu Yang Liu Yong Yu, Yang Liu Yang Liu Yong Yu, Yang Liu Yong Yu, Yong Yu, Yong Yu, Yang Liu Yong Yu, Yong Yu, Yong Yu, Guanghui Xu, Guanghui Xu, Guanghui Xu, Baolin Liu, Yong Yu, Yang Liu Guanghui Xu, Yang Liu Honghui Teng, Yong Yu, Guanghui Xu, Yong Yu, Yong Yu, Yong Yu, Yong Yu, Yong Yu, Yang Liu Baolin Liu, Yong Yu, Yang Liu Yong Yu, Yong Yu, Yong Yu, Yang Liu Yang Liu Yang Liu Yang Liu Yong Yu, Yang Liu Yang Liu Yang Liu

Summary

Micro- and nano-plastics of various concentrations and sizes promoted the uptake and accumulation of the PAH pyrene in water spinach (Ipomoea aquatica), with higher concentrations and smaller MP sizes causing the greatest enhancement. The findings suggest MPs increase the food chain transfer of hydrophobic organic pollutants through edible aquatic crops.

Micro- and nano-plastics (MNPs) in terrestrial ecosystems are attracting increasing attentions. However, the studies of MNPs on the accumulation and migration of organic contaminants in edible plants are relatively scarce. Here, we investigated the impacts and mechanisms of MNPs of different concentrations and sizes on the uptake and toxicity of pyrene in water spinach. The results showed that MNPs had a promotion effect on the uptake of pyrene in various parts of water spinach, leading to the continuous accumulation of pyrene. The promotion effect of high concentration microplastics (MPs, 10 μm) is stronger than that of nanoplastics (NPs, 100 nm). The co-exposure of MNPs and pyrene increased the contents of malondialdehyde (MDA) in water spinach and aggravated the damage of lipid peroxidation. The co-exposure of MNPs and pyrene induced the increase of photosynthetic pigment contents and enhanced chloroplast activity. In addition, the co-exposure stimulated the overexpression of psbA and rbcL genes related to photosynthetic pigments, resulting in genotoxicity of water spinach. This study emphasized that the co-exposure of MNPs and pyrene caused harmful effects and high concentration of MPs caused greater toxicity to water spinach than NPs.

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