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Discrepancy of Growth Toxicity of Polystyrene Nanoplastics on Soybean (Glycine max) and Mung Bean (Vigna radiata)
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Researchers compared how polystyrene nanoplastics affect soybean and mung bean plants grown in water and found that both crops suffered root growth suppression, but through different biological pathways. Soybeans showed more oxidative stress at lower doses, while mung beans were more resilient and only showed significant damage at higher concentrations. The study reveals that different crop species can vary widely in their vulnerability to nanoplastic contamination.
Nanoplastics, as a hot topic of novel contaminants, lack extensive concern in higher plants; especially the potential impact and mechanism of nanoplastics on legume crops remains elusive. In this study, the toxicity of polystyrene nanoplastics (PS-NPs, 200 nm) with diverse doses (control, 10, 50, 100, 200, 500 mg/L) to soybean and mung bean plants grown hydroponically for 7 d was investigated at both the macroscopic and molecular levels. The results demonstrated that the root length of both plants was markedly suppressed to varying degrees. Similarly, mineral elements (Fe, Zn) were notably decreased in soybean roots, consistent with Cu alteration in mung bean. Moreover, PS-NPs considerably elevated malondialdehyde (MDA) levels only in soybean roots. Enzyme activity data indicated mung bean exhibited significant damage only at higher doses of PS-NPs stress than soybean, implying mung bean is more resilient. Transcriptome analysis showed that PS-NPs stimulated the expression of genes associated with the antioxidant system in plant roots. Furthermore, starch and sucrose metabolism might play a key role in coping with PS-NPs to enhance soybean resistance, but the MAPK pathway was enriched in mung bean. Our findings provide valuable perspectives for an in-depth understanding of the performance of plants growing in waters contaminated by nanoplastics.
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Phytotoxic Effects of Polyethylene Microplastics on the Growth of Food Crops Soybean (Glycine max) and Mung Bean (Vigna radiata)
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Researchers tested the effects of polyethylene microplastics on the germination and early growth of soybean and mung bean crops at various concentrations and particle sizes. They found that soybeans were more sensitive to microplastic exposure than mung beans, with significant inhibition of dry weight and root length at higher concentrations. The study suggests that microplastic contamination in agricultural soils could negatively affect food crop development, with impacts varying by plant species and particle characteristics.
Effects of polystyrene microplastics on uptake and toxicity of phenanthrene in soybean
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This study examined how polystyrene microplastics of different sizes affect soybean plants' uptake of the pollutant phenanthrene. Researchers found that microplastics reduced soybean roots' ability to absorb phenanthrene, but micron-sized particles caused more oxidative damage to roots than nano-sized ones, which paradoxically reduced pollutant uptake further. The study highlights that combined exposure to microplastics and organic pollutants can harm crop plants, with the specific effects depending on plastic particle size.
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.
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.
Ecotoxicity and genotoxicity of polystyrene microplastics on higher plant Vicia faba
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Researchers exposed fava bean root tips to polystyrene microplastics and nanoplastics and found reduced biomass, increased oxidative stress, and genetic damage in the plant cells. The smaller nanoplastic particles caused more severe effects than the larger microplastics. The study suggests that plastic particle contamination in soil may threaten plant health at the cellular and genetic level.
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