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Polylactic acid microplastics regulate organophosphorus pesticide impacts on phosphorus bioavailability in soil-plant systems
Summary
Researchers showed that polylactic acid microplastics alter how the organophosphorus pesticide chlorpyrifos affects phosphorus cycling in soil-plant systems, modifying rhizosphere alkaline phosphatase activity and phosphorus bioavailability in rice — highlighting the compounding ecological risks when biodegradable plastics co-occur with agricultural contaminants.
-Pi at the heading stage. CPF alone only affected rhizosphere alkaline phosphatase activity (ALP), while CPF+PLA-MPs exerted effects on non-rhizosphere ALP activity depending on CPF dose and growth stages. These findings indicate that PLA-MPs regulate CPF fate and induce combined effects on plant growth and P cycling in soil-plant system, providing new insights into the ecological risks of multi-contaminants and environmental implications of biodegradable plastics.