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Divergent Responses of Rice ( Oryza sativa L.) Cell Wall to Cd Phytotoxicity Affected by Continuous Nanoplastics Stimulation
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Researchers exposed rice plants to nanoplastics and cadmium, revealing a dosage-dependent dual effect: low nanoplastic doses immobilized 72% of cadmium in roots, while high doses disrupted cell wall integrity and increased cadmium translocation to shoots by 34%, worsening toxicity.
The co-occurrence of nanoplastics (NPs) and heavy metals in agricultural environments presents emerging risks to crop safety, yet the dosage-dependent effects of NPs on their joint phytotoxicity, especially at the cell wall (CW) level, remain poorly understood. In this study, we examine how NPs influence cadmium (Cd) phytotoxicity in rice (Oryza sativa L.), with a particular focus on the root CW. Our results reveal a dosage-dependent "double-edged sword" effect: low-dosage NPs immobilized 72.3% of Cd in the root, while high-dosage NPs disrupted CW integrity, facilitating 34.4% Cd translocation to shoots and exacerbating phytotoxicity. Low-dosage NPs exposure activated carbohydrate and lignin metabolic pathways, increasing the CW thickness by 46.7% and limiting Cd entry. Conversely, high-dosage exposure triggered oxidative stress, impairing CW biosynthesis, causing structural collapse, and increasing CW permeability, thus enhancing Cd uptake. This research improves our understanding of NPs-heavy metal interactions and provides insights for agricultural risk assessment amidst rising plastic pollution.
More Papers Like This
Divergent Responsesof Rice (Oryzasativa L.) Cell Wall to Cd Phytotoxicity Affectedby Continuous Nanoplastics Stimulation
AI summary Read the abstract
Researchers found that nanoplastics exert a dosage-dependent dual effect on cadmium toxicity in rice roots: low doses helped sequester cadmium in the cell wall, while high doses disrupted cell wall structure and allowed 34% more cadmium to translocate to shoots.
Phenotypic Changes and Physiological Genetic Responses of Oryza sativa L. Roots Under Stress of Nanoplastics (NPs) and Cadmium (Cd) in Single and Combination Forms
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Scientists found that tiny plastic particles (nanoplastics) in water can change how toxic cadmium — a harmful heavy metal — affects rice plants, with surprising results: small amounts of nanoplastics actually reduced cadmium's damage to rice roots, while larger amounts made the damage worse. Since rice is a staple food for billions of people, this matters because it suggests that plastic pollution levels in our environment could influence how much toxic metal contamination ends up in our food supply — making it important to keep plastic waste and pollution in check as both plastics and heavy metals continue building up in soil and water.
Exploration of Single and Co-Toxic Effects of Polypropylene Micro-Plastics and Cadmium on Rice (Oryza sativa L.)
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Researchers investigated the single and combined toxic effects of polypropylene microplastics and cadmium on rice plants, finding that co-exposure altered cadmium bioavailability and produced compounded negative effects on plant growth and development.
Oryza rufipogon and nanoparticles mitigate nanoplastic toxicity by modulating lignin, cell wall thickening, and carbohydrate metabolism
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Researchers compared wild rice (Oryza rufipogon) and cultivated rice under nanoplastic stress, finding that wild rice suffered far less growth and chlorophyll loss due to greater lignin deposition, stronger antioxidant defenses, and activation of cell wall-strengthening genes, while adding nano-selenium partially restored growth in both varieties.
Alleviation ofNanoplastic Stress in Rice: Evidencefrom Biochemical, Cytological, Physiological, and Transcriptome Analysis
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Researchers investigated nanoplastic stress responses and mitigation strategies in two rice cultivars through biochemical, cytological, physiological, and transcriptome analyses, testing whether molybdenum oxide nanoparticles could alleviate toxicity via heteroaggregation with nanoplastics. Results confirmed nMo reduced oxidative damage markers and that the wild-derived cultivar S18 maintained better physiological function under combined nMo and nanoplastic treatment than cultivated rice.
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