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

Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 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.

Language: 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, Journal Year: 2021, Volume and Issue: 426, P. 128095 - 128095

Published: Dec. 17, 2021

Language: 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, Journal Year: 2022, Volume and Issue: 56(12), P. 8142 - 8154

Published: June 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.

Language: Английский

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

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: unknown

Published: July 18, 2024

Hydroxyl radicals (

Language: 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, Journal Year: 2024, Volume and Issue: 190, P. 109305 - 109305

Published: Jan. 2, 2024

Language: 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, Journal Year: 2025, Volume and Issue: 487, P. 137175 - 137175

Published: Jan. 13, 2025

Language: 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, Journal Year: 2021, Volume and Issue: 291, P. 132734 - 132734

Published: Oct. 29, 2021

Language: 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, Journal Year: 2022, Volume and Issue: 443, P. 130308 - 130308

Published: Nov. 2, 2022

Language: 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, Journal Year: 2022, Volume and Issue: 307, P. 119447 - 119447

Published: May 16, 2022

Language: Английский

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

Journal of Environmental Sciences, Journal Year: 2022, Volume and Issue: 127, P. 410 - 420

Published: May 31, 2022

Language: Английский

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