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Tissue-specific responses of duckweed to cadmium stress under nanoplastic co-exposure: differential accumulation and toxicity in roots and fronds
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This study found that polystyrene nanoplastics promoted cadmium accumulation in duckweed roots while paradoxically reducing cadmium toxicity in the fronds, revealing tissue-specific differences in how nanoplastic co-exposure modifies metal toxicity in aquatic plants.
Polystyrene nanoplastics (PS-NPs) promoted the accumulation of Cd in duckweed roots, while alleviating the toxicity of Cd in the fronds.
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Influence of cadmium and microplastics on physiological responses, ultrastructure and rhizosphere microbial community of duckweed
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Researchers studied the combined effects of cadmium and polyethylene and polypropylene microplastics on duckweed, an aquatic plant. Interestingly, the study found that microplastics combined with cadmium actually reduced the heavy metal's toxicity to the plant compared to cadmium exposure alone, while also increasing the diversity of beneficial microbes in the root zone.
Microplastic modulates cadmium toxicity in duckweed: Insights into metal uptakes and oxidative stress in the plant
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Researchers found that microplastics in water reduced duckweed's uptake of toxic cadmium by adsorbing the metal onto plastic fibers and causing it to settle into sediments rather than enter plants. While this may seem protective, it highlights a troubling dual role: microplastics can redistribute heavy metals through aquatic systems in ways that affect long-term contamination patterns.
Single and combined effects of polystyrene nanoplastics and Cd on submerged plants Ceratophyllum demersum L.
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Researchers studied the combined effects of nanoplastics and cadmium, a toxic heavy metal, on the aquatic plant Ceratophyllum demersum. They found that nanoplastics worsened cadmium's harmful effects on plant growth, photosynthesis, and cellular health, reducing growth rates by over 35%. The study suggests that when nanoplastics and heavy metals co-occur in water, their combined impact on aquatic plants may be more severe than either pollutant alone.
Polystyrene nanoplastics distinctly impact cadmium uptake and toxicity in Arabidopsis thaliana
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In a study using the model plant Arabidopsis, polystyrene nanoplastics increased the uptake and accumulation of the toxic heavy metal cadmium in plant roots. The combined stress of nanoplastics and cadmium caused worse oxidative damage and growth problems than either pollutant alone. This is concerning because it means microplastics in agricultural soil could help toxic metals get into crops more easily, potentially increasing human exposure through food.
Nanoplastics inDuckweed: Single-Cell Responses andRecovery
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This study examined how polystyrene nanoplastics affect duckweed at the single-cell level, documenting photosynthetic disruption and oxidative stress, as well as partial recovery after exposure ceased. The results indicate aquatic macrophytes have some resilience to nanoplastic stress but can sustain lasting cellular damage at higher doses.
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