Specific Enrichment of arsM-Carrying Microorganisms with Nitrogen Fixation and Dissimilatory Nitrate Reduction Function Enhances Arsenic Methylation in Plant Rhizosphere Soil

Environmental Science & Technology, Год журнала: 2025, Номер unknown

Опубликована: Янв. 14, 2025

Plants can recruit microorganisms to enhance soil arsenic (As) removal and nitrogen (N) turnover, but how microbial As methylation in the rhizosphere is affected by N biotransformation not well understood. Here, we used acetylene reduction assay, arsM gene amplicon, metagenome sequencing evaluate influence of on Vetiveria zizanioides, a potential hyperaccumulator. V. zizanioides was grown mining soils (MS) artificial As-contaminated (AS) over two generations controlled pot experiment. Results showed that content dimethylarsinic acid significantly positively correlated with rate fixation activity nitrite reductase. The As-methylating species (e.g., Flavisolibacter Paraflavitalea) were enriched root-associated compartments second generation MS AS. Notably, higher abundance genes involved (nifD, nifK) dissimilatory nitrate ammonium (narG/H, nirB/D/K/S) detected than first generation. metabolic pathway analysis further demonstrated fixing-stimulative DNRA-stimulative could provide synthesis S-adenosyl-l-methionine, serving as methyl donors for methylation. This study highlights important conversion-stimulative pathways has implications enhancing phytoremediation soils.

Язык: Английский

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Assembly of root-associated bacterial community in cadmium contaminated soil following five-year consecutive application of soil amendments: Evidences for improved soil health

Journal of Hazardous Materials, Год журнала: 2021, Номер 426, С. 128095 - 128095

Опубликована: Дек. 17, 2021

Язык: Английский

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Effects and Mechanisms of Copper Oxide Nanoparticles with Regard to Arsenic Availability in Soil–Rice Systems: Adsorption Behavior and Microbial Response

Environmental Science & Technology, Год журнала: 2022, Номер 56(12), С. 8142 - 8154

Опубликована: Июнь 2, 2022

Copper oxide nanoparticles (CuO NPs) are widely used as fungicides in agriculture. Arsenic (As) is a ubiquitous contaminant paddy soil. The present study was focused on the adsorption behavior of CuO NPs with regard to As well characteristics microbial community changes As-contaminated soil–rice systems response NPs. found that could be temporary sink soil; high dose promoted release from crystalline iron oxide, which increased content liquid phase. also bioavailability changed significantly when higher than 50 mg kg–1 system. addition 100 diversity and abundance genes involved cycling, decreased Fe(III)-reducing bacteria sulfate-reducing genes, accumulation grains. Treatment 500 Fe plaques, rice. adverse effects crops associated risks need considered carefully.

Язык: Английский

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Long-term Application of Agricultural Amendments Regulate Hydroxyl Radicals Production during Oxygenation of Paddy Soils

Environmental Science & Technology, Год журнала: 2024, Номер unknown

Опубликована: Июль 18, 2024

Hydroxyl radicals (

Язык: Английский

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Selective utilization of organic carbon molecules promotes arsenic methylation by increasing methyltransferase activity in arsM-harboring microbes of paddy soils

Soil Biology and Biochemistry, Год журнала: 2024, Номер 190, С. 109305 - 109305

Опубликована: Янв. 2, 2024

Язык: Английский

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Agricultural amendments enhanced the redox cycling of iron species and hydroxyl radical formation during redox fluctuation of paddy soil

Journal of Hazardous Materials, Год журнала: 2025, Номер 487, С. 137175 - 137175

Опубликована: Янв. 13, 2025

Язык: Английский

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Fate of bacterial community, antibiotic resistance genes and gentamicin residues in soil after three-year amendment using gentamicin fermentation waste

Chemosphere, Год журнала: 2021, Номер 291, С. 132734 - 132734

Опубликована: Окт. 29, 2021

Язык: Английский

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Multiple-functionalized biochar affects rice yield and quality via regulating arsenic and lead redistribution and bacterial community structure in soils under different hydrological conditions

Journal of Hazardous Materials, Год журнала: 2022, Номер 443, С. 130308 - 130308

Опубликована: Ноя. 2, 2022

Язык: Английский

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Effects of microbial organic fertilizer (MOF) application on cadmium uptake of rice in acidic paddy soil: Regulation of the iron oxides driven by the soil microorganisms

Environmental Pollution, Год журнала: 2022, Номер 307, С. 119447 - 119447

Опубликована: Май 16, 2022

Язык: Английский

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Root exudates increased arsenic mobility and altered microbial community in paddy soils

Journal of Environmental Sciences, Год журнала: 2022, Номер 127, С. 410 - 420

Опубликована: Май 31, 2022

Язык: Английский

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