Effects of polystyrene nanoplastics (PSNPs) on the physiology of Allium sativum L.: Photosynthetic pigments, antioxidant enzymes, phytohormones, and nutritional quality

[Effects of Polystyrene Nanoplastics (PS-NPs) on the Physiology of Allium sativum L.]

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This Chinese study examined the effects of 80 nm polystyrene nanoplastics on garlic (Allium sativum) grown in hydroponic culture, measuring chlorophyll content, antioxidant enzyme activity, and nutritional quality. The results showed that PS-NPs significantly reduced chlorophyll synthesis, indicating inhibition of photosynthetic capacity.

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

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.

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.

Foliar implications of polystyrene nanoplastics on leafy vegetables and its ecological consequences

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Scientists applied polystyrene nanoplastics to four common leafy vegetables and found that the tiny particles accumulated on leaf surfaces, particularly around the pores plants use to breathe. This accumulation reduced the plants' chlorophyll content and ability to photosynthesize, affecting their growth and nutritional quality. The findings raise concerns that airborne nanoplastic pollution could compromise the safety and nutritional value of the vegetables people eat.