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Elevated CO2 Synergizes with Nanoplastics to Intensify Arsenic Mobilization, Biotransformation, and Plant Uptake in Soil-Spinach Systems
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This research examined how earthworm activity interacts with plastic mulch film residues in agricultural soils, measuring changes in soil enzymatic activity and earthworm behavior in plastic-contaminated plots. The study found that microplastics from mulch films suppress soil enzyme function, with implications for soil health and agricultural productivity.
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Polyethylene Nanoplastics Intensify Arsenic Toxicity in Lettuce by Altering Arsenic Accumulation and Stress Pathways
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Researchers grew lettuce in arsenic-contaminated farmland soil amended with polyethylene nanoplastics and found that nanoplastic exposure increased arsenic accumulation in edible leaves by 35–39%, reduced plant biomass by up to 30%, and disrupted antioxidant metabolism, highlighting compounded food safety risks in contaminated agricultural soils.
Synergistic effects of polystyrene nanoplastics and arsenic on growth and biochemistry of in vitro-grown Oryza sativa: ameliorative role of humic acid
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Researchers found that polystyrene nanoplastics and arsenic together cause greater harm to rice seedlings than either contaminant alone, inhibiting growth, reducing chlorophyll, and increasing arsenic translocation to shoots, while humic acid significantly reduced these combined toxic effects.
Biodegradable and Conventional Microplastics Differentially Affect Soil Nutrient Availability and Stress Responses in Spinach (Spinacia Oleracea L.)
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Researchers grew spinach in soils amended with biodegradable or conventional microplastics at varying concentrations and found both types pose risks: biodegradable MPs reduced biomass and leaf nutrient content, while conventional MPs triggered antioxidant stress responses and altered element availability, with effects scaling to higher application rates.
The adsorption of arsenic on micro- and nano-plastics intensifies the toxic effect on submerged macrophytes
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Researchers investigated how arsenic adsorbs onto microplastics of varying types and sizes, and how those particles affect underwater plants. They found that nanoplastics increased arsenic absorption in aquatic macrophytes by 36-47%, causing more severe leaf damage and oxidative stress than either contaminant alone.
The combined toxicity of polystyrene microplastic and arsenate: From the view of biochemical process in wheat seedlings (Triticum aestivum L.)
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Researchers found that when wheat seedlings were exposed to both arsenic and polystyrene microplastics together, the microplastics reduced arsenic uptake in roots but dramatically increased arsenic transport to the above-ground parts of the plant — by up to 1,000%. This combined exposure caused more oxidative stress and damage to the plants' photosynthetic systems than arsenic alone. The findings suggest that microplastics in contaminated soil could increase how much toxic metal ends up in the edible parts of crops.
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