Elevated atmospheric CO2 concentration changes the eco-physiological response of barley to polystyrene nanoplastics

From soil to shoot plant responses to polystyrene nanoplastics and relevance for sustainable food systems

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Tiny plastic particles from broken-down polystyrene (a common plastic) can be absorbed by plant roots and leaves, sometimes building up in the parts we actually eat, like grains and leafy greens. This review of existing research found that some crops (rice, lettuce, garlic) are harmed by these plastics, showing stress and stunted growth, while others (wheat) seem more resistant, meaning the risk to our food supply likely depends on what we're growing. The bottom line: we need better testing methods to understand how much of this plastic is ending up on our plates and what that means for our health.

Polystyrene nanoplastics drive regime-dependent molecular non-additivity in heat-stressed rice

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Researchers exposed heat-stressed rice to polystyrene nanoplastics and found that while biomass reductions were additive, the molecular responses were highly non-additive—nanoplastics suppressed about half of the plant's heat-acclimation gene program under chronic heat and disrupted circadian clock splicing under acute heat, revealing that organism-level measurements alone can miss significant molecular disruption.

Physiological and Biochemical Effects of Polystyrene Micro/Nano Plastics on Arabidopsis Thaliana

Micro- and Nanoplastics on Plant Functionalities

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Researchers reviewed how micro- and nanoplastics affect plant physiology and function — including germination, root growth, photosynthesis, and nutrient uptake — across a range of crop and wild plant species. Plant uptake of plastic particles is a key mechanism by which microplastic contamination moves from soil into the human food supply, making these effects central to understanding dietary exposure risks.

Navigating microplastic-induced stress in plants: adaptations from physiology to gene regulation

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A bibliometric analysis of 84 studies (2017-2025) found that microplastic exposure in plants triggers stress pathway upregulation, reduces seed germination by up to 20%, disrupts nutrient uptake, and elevates antioxidant enzyme activity. These plant-level disruptions matter for human health because microplastic contamination of agricultural systems can degrade food quality, reduce crop yields, and create exposure pathways through the vegetables and grains people eat.