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Calendula Officinalis Tolerance Response to Polystyrene Microplastics and Galaxolide by Seed Germination, as an Ornamental Plant
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Calendula officinalis L. Tolerance Response to Polystyrene Microplastics and Galaxolide by Seed Germination, as an Ornamental Plant
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Calendula officinalis seedlings showed resistance to polystyrene micro- and nanoplastics as well as the fragrance chemical galaxolide, with both PS particle types actually stimulating sprout growth by 24–74% and triggering upregulation of antioxidant enzymes. Understanding which plants tolerate and potentially phytoremediate microplastic-contaminated soils is valuable for designing green remediation strategies for agricultural and urban land affected by plastic pollution.
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Evidence of Soil Microplastics Inhibiting the Germination of Commercial Coriander Seeds Under Field Conditions
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Field and greenhouse experiments showed that virgin polypropylene, PVC, and polylactic acid microplastics at concentrations as low as 0.05% w/w inhibited coriander seed germination by 60–100% within the first seven days, with PVC causing the greatest inhibition and all polymers inducing oxidative stress in root tips. These results indicate that even unaged microplastics pose direct phytotoxic risks in agricultural soils, threatening crop yields and food security independent of chemical additive leaching.
Exploring the Impacts of HDPE Microplastics on Growth and Physiological Behavior of Brassica juncea (Mustard Plant)
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Researchers demonstrated that HDPE microplastics reduce chlorophyll, phenolic, and proline content in mustard plants (Brassica juncea) and showed — for the first time — that microplastics translocate from roots to leaves via fluorescence and confocal microscopy. This evidence of root-to-shoot microplastic transfer in a food crop raises direct concerns about human dietary exposure through consuming contaminated vegetables grown in plastically polluted agricultural soils.
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