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ABSTRACT: Soil microplastics

PROVIDER: PRJNA643592 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR12131275_1.fastq.gz	Fastqsanger.gz
	SRR12131275_2.fastq.gz	Fastqsanger.gz
	SRR12131276_1.fastq.gz	Fastqsanger.gz
	SRR12131276_2.fastq.gz	Fastqsanger.gz
	SRR12131277_1.fastq.gz	Fastqsanger.gz

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Polystyrene nano- and microplastic particles induce an inflammatory gene expression profile in neural stem cell-derived astrocytes

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Mechanisms of poly(butylene adipate-co-terephthalate) microplastic degradation in agricultural soil: Insights from the soybean rhizosphere

Project description:<p>The increasing application of biodegradable mulch films in agriculture has raised concerns regarding the potential persistence of biodegradable microplastics (BMPs) in soil and their subsequent ecological impacts. Although these materials are designed to mineralize, their actual rates of breakdown under field conditions vary widely, and the role of plant roots in modulating BMP transformation through the rhizosphere effect remains poorly understood. In particular, how the complex biochemical environment of the rhizosphere influences BMP degradation and byproduct accumulation represents a critical knowledge gap. Here we show that the soybean rhizosphere significantly enhances the degradation of 1% (w/w) large (998.7 ± 74.6 μm) poly(butylene adipate-co-terephthalate) microplastics (PBAT-MPs), whereas small (145.6 ± 3.1 μm) particles remain largely protected within soil aggregates over a 70-day growth cycle. This size-dependent effect is accompanied by preferential hydrolysis of aliphatic adipate units, leading to greater accumulation of degradation monomers in the rhizosphere than in bulk soil. We further demonstrate that PBAT degradation is associated with increased microbial biomass, altered soil carbon pools, and the enrichment of Proteobacteria, particularly Bradyrhizobium and Ramlibacter, which are linked to PBAT hydrolysis and metabolite utilization. These findings redefine the role of plant roots in regulating the fate of biodegradable microplastics in soil and highlight that biodegradable mulches cannot be assumed to degrade benignly under realistic agricultural conditions. Our work underscores the need for rhizosphere relevant criteria when assessing the environmental safety of biodegradable plastics.</p>

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Project description:Microplastics represent a growing environmental concern for the oceans due to their potential capability to adsorb different classes of pollutants, thus representing a still unexplored source of exposure for aquatic organisms. In this study polystyrene (PS) microplastics were characterized for their capability to adsorb pyrene (PYR) as model compound for polycyclic aromatic hydrocarbons, and transfer this chemical to filter feeding mussels Mytilus galloprovincialis. Gene expression analyses of Mytilus galloprovincialis exposed to polystyrene (PS) microplastics and to polystyrene contaminated with pyrene (PS-PYR) have been performed trough a DNA microarray platform.

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Project description:Microplastics, soil and protist

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Project description:Soil metagenomics associated with microplastics

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Effect of the PET microplastics on pancreas - in vivo study on pig

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Long term exposure of PB-MP has no effect on the metabolism of mice

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Long term expousre of PE-MP has no effect on the metabolism of mice

Project description:Microplastics are defined as plastics ranging in size from 0.1μm to 5mm. Currently, research is being conducted across various fields to examine the effects of microplastics. Some studies demonstrated negative impacts on cells and mice. However, there is a lack of research on the effects by long-term exposure to microplastics. Most of the papers evaluated cytotoxicity with period of less than 2 months. Therefore, in this study, we investigated the potential issues that may arise from prolonged exposure through food mixed with Polyethylene microplastic (PE-MP) for over a year. We divided our study into short, mid, and long-term periods to assess cytotoxicity through Glucose tolerance test, Insulin tolerance test, analysis of insulin and c-peptide levels, hanging, grip, treadmill, Y-maze and open field tests, Respiratory Exchange Ratio, Energy Expenditure, Activity, and body composition. Through this, we comprehensively examined potential issues related to mouse behavior, muscle, metabolism and other factors. After dissection, RNA sequencing was carried out to investigate the effects on genes. For further verification, RT-qPCR was conducted. To summarize, our study provides evidence suggesting that treatment of microplastics for a short term has adverse effects, but with prolonged exposure, their effects tend to diminish.

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