Biochemical and transcriptomic responses of buckwheat to polyethylene microplastics

Zhang, Yanyan; Tian, Xianrui; Huang, Pengxinyue; Yu, Xiumei; Xiang, Quanju; Zhang, Lingzi; Gao, Xuesong; Chen, Qiang; Gu, Yunfu

doi:10.1016/j.scitotenv.2023.165587

Cited by 26 publications

(3 citation statements)

References 35 publications

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“…Additionally, PS-NPs at a concentration of 10 mg/L slightly promoted the growth of mung bean roots, whereas high concentrations of PS-NPs inhibited the growth of mung bean roots ( p > 0.05). These findings are consistent with those of Lian and Zhang et al [ 19 , 29 ]. However, the mechanism by which low concentrations of PS-NPs promoted plant root growth was unclear, and a possible reason for this phenomenon is that PS-NPs stimulate the secretion of certain hormones (e.g., growth hormone) in the mung bean roots, which may help mung beans adapt to environmental changes and maintain their physiological functions.…”

Section: Resultssupporting

confidence: 94%

“…Notably, the hydrated particle size of the PS suspension resembled the microsphere of the TEM value, indicating that the PS-NPs are uniformly dispersed in ultrapure water. In addition, according to the DLVO theory, the zeta potential of the PS suspension ranged from −30 to −60 mV, confirming the stability of the dispersed system [ 21 , 29 ].…”

Section: Resultsmentioning

confidence: 88%

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Discrepancy of Growth Toxicity of Polystyrene Nanoplastics on Soybean (Glycine max) and Mung Bean (Vigna radiata)

Su,

Li,

Zhang

et al. 2024

Toxics

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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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Section: Resultssupporting

confidence: 94%

Section: Resultsmentioning

confidence: 88%

Discrepancy of Growth Toxicity of Polystyrene Nanoplastics on Soybean (Glycine max) and Mung Bean (Vigna radiata)

Su,

Li,

Zhang

et al. 2024

Toxics

View full text Add to dashboard Cite

show abstract

“…Similar to this study, Lian et al reported that the CAT activity of soybean seedlings increased after PLAMPs treatment, but there was no significant effect on SOD activity [47]. Exposure to PE-MPs stimulated the antioxidant system reaction of buckwheat and caused an increase in POD and SOD [48]. Changes in the antioxidant defense system induced by MPs vary largely according to plant species, MPs size and type, and exposure time [49,50].…”

Section: Effects Of Biodegradable Microplastics On Active Oxygen Spec...supporting

confidence: 81%

The Degradability of Microplastics May Not Necessarily Equate to Environmental Friendliness: A Case Study of Cucumber Seedlings with Disturbed Photosynthesis

Zhang,

Huang,

et al. 2023

Agriculture

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In the environment, degradable plastics are decomposed into biodegradable microplastics (Bio-MPs), but there is limited study on the impact on plant growth and development. Therefore, this study aimed to investigate biodegradable polylactic acid microplastics (PLA-MPs) and nonbiodegradable polystyrene microplastics (PS-MPs) with different concentrations (0.02%, 0.2%, and 2% w/w) to explore their short-term toxic effects on cucumbers. The results of this study showed that PLA-MPs significantly (p < 0.05) reduced the aboveground and belowground biomass of cucumber seedlings compared to the control. At the level of 2% MPs, the chlorophyll content and PRI vegetation index of cucumber plants decreased significantly, anthocyanin content increased, and the photosynthetic system was disturbed. Likewise, the antioxidant defensive system of cucumber was affected after exposure to MPs stress, especially under 2% levels. The hyperspectral image is a novel technique which analyzed the chlorophyll content and absorption under MPs treatment; there was still a high correlation between chlorophyll content, anthocyanin content, and MCARI vegetation index, so a single vegetation index could be used for rapid detection of plant physiological status. Our study suggests that Bio-MPs have potential ecological toxicity that could affect the growth of cucumber seedlings through deactivation of the PSII reaction center. Therefore, biodegradable plastics do not seem to be the optimal solution, and there is an urgent need for long-term monitoring and evaluation of the biological toxicity of biodegradable MPs.

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Advances in Physiological and Ecological Effects of Microplastic on Crop

Jiang,

Zhao,

Liang

et al. 2024

J Soil Sci Plant Nutr

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Biochemical and transcriptomic responses of buckwheat to polyethylene microplastics

Cited by 26 publications

References 35 publications

Discrepancy of Growth Toxicity of Polystyrene Nanoplastics on Soybean (Glycine max) and Mung Bean (Vigna radiata)

Discrepancy of Growth Toxicity of Polystyrene Nanoplastics on Soybean (Glycine max) and Mung Bean (Vigna radiata)

The Degradability of Microplastics May Not Necessarily Equate to Environmental Friendliness: A Case Study of Cucumber Seedlings with Disturbed Photosynthesis

Advances in Physiological and Ecological Effects of Microplastic on Crop

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