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Evidence of parental transfer of nanoplastics in pea (Pisum sativum) plants
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In a striking finding, researchers showed that pea plants exposed to nanoplastics passed those particles to their seeds, and the next generation of plants grown from those seeds still contained nanoplastics even in clean soil. The nanoplastics were found in the vascular tissue of both generations, and the second generation showed reduced crop yield and altered nutrient content. This parental transfer of nanoplastics through plants raises serious concerns about long-term contamination of food crops across growing seasons.
The increasing abundance of nanoplastics in the environment is a cause of serious concern and its acute and chronic effects on ecosystems need to be thoroughly investigated. Toward this end, this study investigated the parental transfer of nanoplastics by chronically exposing Pisum sativum (pea) plants to nanoplastics through soil medium. We observed the presence of nanoplastics in harvested fruits and a subsequent generation of plants replanted in uncontaminated soil using confocal laser scanning microscopy. The fluorescence was located in the cell wall of the vascular bundles, but not in the epidermis, indicating the parental transfer of nanoplastics. In addition, we determined the effects of nanoplastics on the health of subsequent plant generations by estimating the reproductive factors and measuring the content of individual nutrients in peas. Decreases in crop yield and fruit biomass, in addition to changes in nutrient content and composition, were noted. The transgenerational effects of nanoplastics on plants can profoundly impact terrestrial ecosystems, including both plant species and their predators, raising critical safety concerns. Our findings highlight the evidence of parental transfer of nanoplastics in the soil through plants and shows that the chronic effects of nanoplastics on plants may pose a threat to the food supply.
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Grandparental transfer of nanoplastics in pea plants (Pisum sativum): Transmission from soil to third generations
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Researchers exposed the first generation of pea plants to nanoplastics and then grew two subsequent generations in clean soil, detecting nanoplastic fluorescence inside cells of the third generation — demonstrating that nanoplastics can be passed from grandparent to grandchild plants and persist in soil food webs.
Translocation and chronic effects of microplastics on pea plants (Pisum sativum) in copper-contaminated soil
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Researchers studied how polystyrene nanoplastics affect pea plants grown in copper-contaminated soil over a full growing season. They found that the combination of nanoplastics and copper reduced crop yield, impaired nutritional quality, and that nanoplastic particles were taken up and transported throughout the plant tissues. The study suggests that microplastic contamination in polluted agricultural soils may compound existing threats to crop productivity and food safety.
Transgenerational Transfer and Effects of Polystyrene Nanoplastics in the Floating Macrophyte Spirodela polyrhiza
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Scientists found that tiny plastic particles (nanoplastics) can pass from a parent aquatic plant to its "grandchildren" generations, even when those younger plants were never directly exposed to the plastic. This inherited exposure stunted plant growth and disrupted key biological processes—suggesting plastic pollution's harm can echo across generations, not just affect the individual exposed. While this study was done in a water plant, it raises important questions about whether similar long-term, multi-generational effects could occur in other organisms—something worth watching as we learn more about how nanoplastics move through the food chain and potentially affect human health.
Plastic and plants
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A study found a mechanism by which nanoplastics can enter plant roots, raising concerns about whether plastic particles in soil could accumulate in food crops. This highlights a potential pathway for nanoplastics to reach the food supply through agricultural uptake.
Nanoplastics Induce Transgenerational Impacts on Tomato Growth, Oxidative Stress, and Nutritional Quality
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Tiny plastic particles in soil (called nanoplastics, which come from breaking-down plastic waste) stunted tomato plant growth, delayed ripening, and reduced both the amount and nutritional quality of the fruit—and stressed the plants at a cellular level. Interestingly, the next generation of plants grown from these exposed tomatoes showed somewhat less damage, suggesting plants may partially adapt over generations, but the initial harm to crop yield and quality is still a concern as plastic pollution builds up in farmland soils. Since tomatoes are a staple food crop, this research is an early warning sign that
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