Potential impact and mechanism of aged polyethylene microplastics on nitrogen assimilation of Lactuca sativa L.

Ecotoxicology and Environmental Safety, Год журнала: 2025, Номер 291, С. 117862 - 117862

Опубликована: Фев. 1, 2025

Nitrogen (N) is the driving factor for crop yield and quality, more research needed on mechanisms of aged micro/nano plastics (MNPs) N assimilation in edible crops. In this study, pot experiments were conducted to investigate potential effect polyethylene (PE) microplastic addition (particle sizes: 20 0.1 µm, levels: 0.5 % [w/w], referred as control (CK), P20 (20-µm PE), AP20 P0.1 (0.1-µm AP0.1 PE) MNPs accumulation romaine lettuce (Lactuca sativa L.). The results showed that particle size accumulated decreased from root > stem leaf. Compared CK, fresh plant weight significantly by 40.84 51.62 AP0.1, respectively. indicated could affect growth via soil nutrient availability, 100-nm PE NH4+ TN concentrations 9.10 21.99 %, respectively, compared CK. was inhibited MNPs, which manifested soluble protein content under treatments being reduced 30.59 42.11 respectively (P < 0.01). Possible included inhibition carbon assimilation, photosynthesis, Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco). toxic much greater than size, attributed carbonyl hydroxyl groups caused aging. Structural equation modeling nitrogen positively affected total (TN) (0.359), chlorophyll (0.665), Rubisco (0.441), (0.383), biomass (0.460), negatively phosphoenolpyruvate carboxylase (PEPC) (-0.325), sugar (-0.134). This study enhances current understandings effects microplastics findings vegetables may agricultural sustainability food safety.

Язык: Английский

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Polypropylene microplastic exposure modulates multiple metabolic pathways in tobacco leaves, impacting lignin biosynthesis

Ecotoxicology and Environmental Safety, Год журнала: 2025, Номер 292, С. 118005 - 118005

Опубликована: Март 1, 2025

The adverse effects of microplastics (MPs) and nanoplastics (NPs) on plant growth have gained significant attention. However, the response tobacco plants to polypropylene (PP-MPs) remains poorly understood. To address this, a microcosm experiment was conducted in which seedlings were exposed PP-MPs at varying concentrations (100 1000 mg/kg) particle sizes (20 nm 100 µm) for 48 days red soil. physicochemical, transcriptomic, metabolic responses PP-MP treatments assessed. Our findings indicate that effect exposure dose-dependent, with higher doses (1000 inducing significantly stronger responses. Further, accumulation key metabolites phenylpropanoid flavonoid biosynthesis pathways such as quercetin, phloretin, kaempferol, liquiritigenin, naringin, myricetin, ferulic acid, formaldehyde, methyl eugenol observed PP-MPs. Additionally, transcriptomic analysis revealed enriched more DEGs than lower. KEGG pathway identified enrichment biosynthesis, sesquiterpenoid triterpenoid hormone signal transduction. notable variation expression enzyme-related genes PAL, CHI, CSE, C4H, 4CL, COMT, CYP indicates substantial impact lignin synthesis. Lastly, large-sized PPMPs alter activity lignin-degrading enzymes, affecting content. This study offers valuable insights into PP-MPs, integrating both physicochemical molecular perspectives.

Язык: Английский

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Interactions of Microplastics with Co-Occurring Pollutants in Soil Environment

Water Air & Soil Pollution, Год журнала: 2025, Номер 236(4)

Опубликована: Март 10, 2025

Язык: Английский

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Single and Combined Effects of Aged Polyethylene Microplastics and Cadmium on Nitrogen Species in Stormwater Filtration Systems: Perspectives from Treatment Efficiency, Key Microbial Communities, and Nitrogen Cycling Functional Genes

Molecules, Год журнала: 2025, Номер 30(7), С. 1464 - 1464

Опубликована: Март 26, 2025

Microplastics and heavy metal contamination frequently co-occur in stormwater filtration systems, where their interactions may potentially compromise nitrogen removal. Current research on microplastics Cd predominantly focuses soils constructed wetlands, with limited attention given to systems. In this study, the single synergistic effects of aged polyethylene (PE) cadmium (Cd) infiltration systems were investigated from perspectives removal, microbial community structures, predicted functional genes cycling. Results showed that PE demonstrated stronger inhibition NO3−–N removal than Cd. Low-level (PE content: 0.1% w/w) Cd-contaminated inhibitory effect high-level 5% w/w). The mean efficiency under combined Cd50 (Cd concentration: 50 μg/L) PE5 during sixth rainstorm event was 1.04 34.68 times other scenarios. Metagenomic analysis identified keystone genera (Saccharimonadales, Enterobacter, Aeromonas, etc.), critical transformation pathways (nitrate reduction ammonium, denitrification, fixation, nitrification) govern system performance. most pronounced nitrification/denitrification enzymes beyond nitrite oxidase nitrate reductase. These mechanistic findings advance our understanding co-contaminant

Язык: Английский

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Accelerating biodegradation efficiency of low-density polyethylene and its hazardous dissolved organic matter using unexplored polyolefin-respiring bacteria: New insights on degradation characterization, biomolecule influence and biotransformation pathways

Journal of Hazardous Materials, Год журнала: 2025, Номер unknown, С. 138144 - 138144

Опубликована: Апрель 1, 2025

Язык: Английский

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Unveiling the microplastics degradation and its transformative effects on soil nutrient dynamics and plant health – A systematic review

Sustainable Production and Consumption, Год журнала: 2024, Номер unknown

Опубликована: Дек. 1, 2024

Язык: Английский

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Global perspective of ecological risk of plastic pollution on soil microbial communities

Frontiers in Microbiology, Год журнала: 2024, Номер 15

Опубликована: Окт. 9, 2024

Introduction The impacts of plastic pollution on soil ecosystems have emerged as a significant global environmental concern. progress in understanding how affects microbial communities and ecological functions is essential for addressing this issue effectively. Methods A bibliometric analysis was conducted the literature from Web Science Core Collection database to offer valuable insights into dynamics trends field. Results To date, effects residues enzymatic activities, biomass, respiration rate, community diversity been examined, whereas microbes are still controversial. Discussion include comprehensive examination combined residue properties (Type, element composition, size age), (soil texture, pH) at environmentally relevant concentrations with various exposure durations under field conditions future studies crucial holistic impact ecosystems. Risk assessment pollution, particularly nanoplasctics, perspective food web ecosystem multifunctioning also needed. By critical knowledge gaps, scholars can play pivotal role developing strategies mitigate risks posed by microorganisms.

Язык: Английский

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Adaptive denitrification adjustment by marimo for enhanced nitrate nitrogen removal in lake restoration

Journal of environmental chemical engineering, Год журнала: 2024, Номер 12(6), С. 114506 - 114506

Опубликована: Окт. 18, 2024

Язык: Английский

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Microplastics affect organic nitrogen in sediment: the response of organic nitrogen mineralization to microbes and benthic animals

Journal of Hazardous Materials, Год журнала: 2024, Номер 485, С. 136926 - 136926

Опубликована: Дек. 17, 2024

Язык: Английский

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