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Study on the effect of microplastics on the growth of mung bean seedlings based on FTIR and 2D-COS spectroscopy
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Scientists found that when mung bean sprouts were grown in soil containing high levels of certain microplastics (tiny plastic particles), the plants sprouted less often and grew shorter roots and stems, with changes even visible at the molecular level in their proteins and cell walls. This matters because microplastics are increasingly found in farm soils, and this research suggests they could potentially affect crop growth and quality — though more studies are needed to know exactly what this means for the food we eat.
Microplastics (MPs) are emerging agroecosystem pollutants, and their effects on crop growth warrant attention. In this paper, we investigated the effects of polystyrene (PS) and polymethyl methacrylate (PMMA) microplastics on mung bean (Vigna radiata) seed germination and early growth under concentration gradients (10–1000 mg/L). The results showed that, for PS, germination rate (GR) showed no significant change at low concentrations but decreased at high concentrations. PS microplastics inhibited the growth of roots and stems of seedlings. PMMA did not exhibit a significant effect on GR and only had a slight effect on early growth. Fourier-transform infrared (FTIR) spectral curve fitting of mung bean seedling tissues in the protein amide I region showed that the proportion of random coils increased, and the effect of PS was more substantial than that of PMMA. Curve fitting of the polysaccharide region in mung bean seedling tissues showed that a high concentration of PS caused an increase in peak area at 1049 cm−1 and a slight decrease in peak area at 1158 cm−1, while PMMA treatment showed similar but weaker changes. Synchronous two-dimensional correlation spectroscopy (2D-COS) of mung bean seedling tissues showed that under high PS, the dominant auto-peak shifted from 890 to 910 cm−1 with increasing germination days, accompanied by more and stronger positive cross-peaks; changes under PMMA were minor. Our results suggest spectroscopic changes consistent with alterations in protein conformation and cell-wall polysaccharide organization under microplastic exposure. This study provides spectroscopic insights into the early structural responses of mung bean seedlings to different microplastic exposures under controlled conditions.
More Papers Like This
Study on the effect of microplastics on the growth of mung bean seedlings based on FTIR and 2D-COS spectroscopy
AI summary Read the abstract
Scientists found that high levels of certain microplastics (tiny plastic particles) can stunt the growth of mung bean sprouts and change the structure of their proteins and cell walls, while other types of plastic had little effect. This matters because microplastics are increasingly found in soil and water, and if they can disrupt how crops grow at the molecular level, that could eventually affect food quality and crop yields — though more research is needed to know exactly what this means for the food we eat.
Study on the effect of microplastics on the growth of mung bean seedlings based on FTIR and 2D-COS spectroscopy
AI summary Read the abstract
Scientists found that when mung bean seedlings were exposed to high levels of certain microplastics (tiny plastic particles), one type—polystyrene—stunted root and stem growth and even changed the structure of proteins and cell walls inside the plant, while another common plastic, PMMA, had much milder effects. This matters because microplastics are increasingly ending up in soil and water used for farming, and this study suggests they could potentially affect crop growth and quality—though more research is needed to know what this means for the food we eat.
Raman-verified polystyrene microplastics in mung bean roots with FTIR-detected protein conformational changes
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Scientists confirmed that tiny polystyrene plastic particles (a common plastic found in packaging and foam products) can get absorbed into the roots of mung bean plants, and this exposure caused subtle changes in the shape of proteins inside the plant. While this study didn't test humans, it matters because mung beans are a food crop, and this research helps build the tools needed to track how microplastics move from soil into the food we eat—an important step for understanding potential long-term risks to our health.
Impacts of microplastics on terrestrial plants: A critical review
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This review examines how microplastics affect land-based plants, finding that they can alter soil structure, disrupt beneficial soil microbes, and reduce plant growth. Microplastics also carry toxic chemicals like plasticizers and heavy metals that can be taken up by plant roots and enter the food chain. The findings raise concerns about human health since contaminated crops could be a hidden source of microplastic and chemical exposure in our diets.
Impact of Microplastics on Germination Index and Proline Content of Crop Plants
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Tiny plastic bits from pollution are seeping into farm soil, and this study found they can slow seed sprouting and stunt early growth in crops like peas and amaranth—with peas struggling more than amaranth. Since these crops end up on our plates, this research is an early warning sign that plastic pollution could eventually affect food supply and quality, reinforcing why cutting down on plastic waste matters for both the environment and what we eat.
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