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Physiobiochemical and transcriptional responses of tobacco plants (Nicotiana tabacum L.) to different doses of polystyrene nanoplastics
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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.
In recent years, studies on the interactions between nanoplastics (NPs) and higher plants have attracted widespread attention. However, higher plants seem to respond differently to different doses of NPs. Currently, few comprehensive studies have shown the responses of tobacco plants (Nicotiana tabacum L.) to different concentrations of NPs, especially their molecular mechanisms. In this study, we treated hydroponic tobacco seedlings with 0, 1, 10 or 50 mg/L polystyrene nanoplastics (PSNPs) to explore the potential underlying mechanisms via a combined physiological and transcriptomic analysis. Physiobiochemical results suggested that 1 mg/L PSNPs increased the biomass, chlorophyll content, photosynthesis and nutrient (nitrogen, phosphorus and potassium) content of tobacco seedlings, which promoted plant growth, whereas 10 and 50 mg/L PSNPs induced ROS accumulation, enhanced superoxide dismutase and peroxidase activities, decreased the biomass, chlorophyll content and photosynthesis, and interfered with the normal nutrient and hormone balance, which contributed to the inhibition of tobacco seedling growth. The transcriptomic results indicated that PSNPs modulated the expression of genes involved mainly in phenylpropanoid and flavonoid biosynthesis, starch and sucrose metabolism, photosynthesis and the tricarboxylic acid (TCA) cycle. Our study provides an in-depth comprehension of the response of tobacco to different concentrations of NPs from physiobiochemical and molecular perspectives.
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Toxicity effects of nanoplastics on soybean (Glycine max L.): Mechanisms and transcriptomic analysis
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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.
Molecular mechanisms of toxicity and detoxification in rice (Oryza sativa L.) exposed to polystyrene nanoplastics
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Researchers studied how polystyrene nanoplastics affect rice seedlings at the molecular level. They found that nanoplastic exposure significantly reduced root and shoot growth by over 50%, while triggering oxidative stress and activating genes related to both toxicity and defense responses. The study provides new insights into how crop plants respond to nanoplastic contamination at the genetic and physiological level.
Nanotoxicological effects and transcriptome mechanisms of wheat (Triticum aestivum L.) under stress of polystyrene nanoplastics
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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.
Transcriptomic data from the integrative transcriptomic and WGCNA-based analysis of combined stress mechanisms of polypropylene micro/nanoplastics on tobacco photosynthesis and antioxidant systems
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Scientists studied how tiny plastic particles (from a common plastic called polypropylene) affect tobacco plants, looking specifically at how these particles mess with the plants' ability to photosynthesize and defend themselves from stress at the genetic level. While this research was done in plants rather than humans, it adds to growing evidence that micro/nanoplastics can disrupt basic biological processes—which matters because these same tiny plastic particles are increasingly found in our food, water, and even our bodies.
Response of soybean (Glycine max L.) seedlings to polystyrene nanoplastics: Physiological, biochemical, and molecular perspectives
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Researchers examined the effects of polystyrene nanoplastics on soybean seedlings in a hydroponic experiment and confirmed that the nanoparticles were taken up by plant roots. The study found that nanoplastic exposure negatively affected growth, increased mineral content in roots and leaves, caused oxidative stress, and altered gene expression related to stress response and hormone signaling pathways.
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