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Aged polylactic acid microplastics with ultraviolet irradiation alleviated the toxic effect of Cd on pakchoi (Brassica chinensis L.) in hydroponics
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Effects of Polyethylene and Heavy Metal Cadmium on the Growth and Development of Brassica chinensis var. chinensis
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Pot experiments with Chinese cabbage showed that both cadmium and polyethylene microplastics reduced biomass, chlorophyll content, and root development, while the combination of the two stressors resulted in polyethylene partially mitigating cadmium's effects on growth — possibly by reducing cadmium bioavailability in soil. These results reveal complex interactions between microplastics and heavy metals in agricultural soils, with implications for predicting contamination effects on food crop safety.
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Scientists tested how plastic pollution (microplastics) and cadmium, a toxic heavy metal, affect Chinese cabbage grown in contaminated soil, both matter because they can build up in crops we eat and impact human health. Surprisingly, small-to-moderate amounts of microplastics actually helped protect the cabbage from cadmium's harmful effects by changing soil chemistry and boosting helpful soil microbes, though this doesn't mean microplastic pollution is safe overall. This research shows the relationship between plastic pollution and toxic metals in soil is complicated, and more study is needed before we underst
Aged polylactic acid microplastics with ultraviolet irradiation stunted pakchoi (Brassica chinensis L.) germination and growth with cadmium in hydroponics
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Researchers found that UV-aged biodegradable PLA microplastics were more harmful to plant growth than fresh ones, especially when combined with cadmium contamination. The aged microplastics increased oxidative damage and reduced nutrient uptake in pakchoi plants. This matters because biodegradable plastics are promoted as eco-friendly alternatives, but they may become more toxic as they break down in the environment.
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Researchers investigated the combined effects of naturally aged polylactic acid (PLA) microplastics and cadmium on pakchoi growth in soil. The study found that aged PLA microplastics were more detrimental than virgin ones, and the combination with cadmium further stunted plant growth and disrupted antioxidant systems and soil microbial activities.
Single and combined effects of secondary polyethylene microplastic on the growth of Pak choi and the soil microbiome composition
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Researchers found that secondary polyethylene microplastics (aged via weathering and mechanical stress) significantly inhibited Pak choi growth, caused oxidative damage to plant cells, and altered soil microbial composition, while showing antagonistic combined effects with DDT and naphthalene due to MP adsorption of co-contaminants. Agriculturally realistic aged PE microplastics harm food crops and disrupt the soil microbiome, with soil chemical properties changing in ways that could affect long-term agricultural productivity.
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