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Polystyrene Nanoplastics Affect the Expression of Genes Involved in Cellular Processes in Arabidopsis thaliana (L.)
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Scientists exposed a common lab plant to tiny plastic particles (nanoplastics) and found they disrupted genes controlling cell growth, stress responses, and the plant's ability to defend itself and remove toxins. While this study was done in plants, not humans, it adds to growing evidence that nanoplastics—now found in our air, water, and food—can interfere with basic biological processes at the cellular level, raising questions about their potential effects on the crops we eat and, ultimately, our own health.
This study examines how polystyrene nanoplastics (PS-NPs) influence the expression of genes associated with cell cycle and stress responses in Arabidopsis thaliana leaves. For this purpose, seedlings were exposed to PS-NPs at concentrations of 0, 10, 20, and 40 mg L-1 for seven days under hydroponic conditions. Transmission electron microscopy analysis revealed that PS-NPs were predominantly spherical in morphology. The expression levels of genes associated with the cell cycle (CYCD3;1), cell wall modification (TCH4 and KOR), detoxification (MATE1 and MATE2) and stress response (HSP70 and HSP90.1) were determined by qRT-PCR. PS-NPs exposure led to significant downregulation of CYCD3;1, TCH4, KOR, HSP70, HSP90.1, and MATE2 expression, while MATE1 gene was upregulated. These findings demonstrate that PS-NPs affect specific molecular processes and mechanisms in plants.
More Papers Like This
Polystyrene Nanoplastics Affect the Expression of Genes Involved in Cellular Processes in Arabidopsis thaliana (L.)
AI summary Read the abstract
Scientists found that tiny plastic particles (from broken-down polystyrene, like Styrofoam) can mess with a plant's genes—shutting down ones needed for growth, stress defense, and detoxification. While this study was done in a lab plant (not food crops) and doesn't directly test human health effects, it raises a flag: if nanoplastics can disrupt basic plant biology, they may also affect the crops we eat, which is worth watching given how much plastic pollution has spread into soil and water.
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Researchers studied how polystyrene nanoplastics affect wheat plants at the molecular level using gene expression analysis. They found that nanoplastic exposure disrupted genes involved in photosynthesis, hormone signaling, and stress responses, ultimately reducing plant growth. The study provides new insights into how nanoplastic contamination in agricultural soils could harm crop development at a fundamental biological level.
Physiological and biochemical effects of polystyrene micro/nano plastics on Arabidopsis thaliana
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Experiments on the model plant Arabidopsis showed that polystyrene nano- and microplastics reduced seed germination, stunted growth, lowered chlorophyll levels, and triggered oxidative stress in roots, with smaller particles and higher concentrations causing the most damage. These findings raise concerns about how microplastic contamination in agricultural soil could affect crop health and ultimately food production.
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Researchers examined how different concentrations of polystyrene nanoplastics affect tobacco plant growth at both the physiological and molecular levels. They found that higher doses caused oxidative stress, reduced photosynthesis, and triggered significant changes in gene expression related to stress responses. The study reveals that nanoplastic toxicity in plants is dose-dependent and involves complex molecular mechanisms beyond simple physical damage.
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Researchers exposed soybean plants to polystyrene nanoplastics and observed inhibited stem and root growth, increased oxidative stress, and disrupted photosynthesis. Transcriptomic analysis revealed that nanoplastics altered the expression of genes involved in plant stress responses, hormone signaling, and metabolic pathways. The study suggests that nanoplastic contamination in agricultural soils could negatively affect crop growth and yield at the molecular level.
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