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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Enhanced methanogenesis and efficient ciprofloxacin degradation via nZVI@LDH in an electricity-driven anaerobic bioreactor: A biotic-abiotic hybrid system for ROS regulation and ARGs mitigation

Journal of Hazardous Materials, Год журнала: 2025, Номер unknown, С. 137348 - 137348

Опубликована: Янв. 1, 2025

Язык: Английский

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Distinct mechanisms of stibnite (Sb2S3) oxidative dissolution mediated by acid-generating and alkali-generating microorganisms within a wide pH range

Journal of Hazardous Materials, Год журнала: 2025, Номер unknown, С. 138141 - 138141

Опубликована: Апрель 1, 2025

Язык: Английский

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Manganese toxicity suppressing nitrogen-fixing bacteria growth and impairing nitrogen uptake and utilization in sugarcane

Frontiers in Microbiology, Год журнала: 2025, Номер 16

Опубликована: Апрель 16, 2025

Sugarcane (Saccharum spp.) is a crucial crop for sugar and bioethanol production. However, sugarcane grown in the acidic soils of southern China often suffers from severe leaf chlorosis due to excessive soil manganese (Mn). This study investigates effects Mn toxicity on physicochemical properties microbial communities rhizosphere soil, as well its impact growth nitrogen uptake utilization. Soil samples were collected fields with varying levels toxicity. Physicochemical analyzed, including pH, available nitrogen, community composition. The was assessed through measurements plant biomass, chlorosis, efficiency. significantly lowered pH altered structure. Bacterial genera such Nocardioides Sinomonas, which are involved ureolysis, cellulolysis, oxidation, promoted. In contrast, like Nitrospirota, associated fixation, inhibited. disruption hindered conversion ammonium nitrate reducing nitrogen. Consequently, development suppressed, limited. findings highlight detrimental cultivation high-Mn areas. composition reduced availability directly growth. These results underscore importance applying appropriate fertilizers mitigate improve fertility regions. Future research should focus developing strategies enhance cycling promote beneficial support sustainable

Язык: Английский

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Soil-dependent responses of bacterial communities, phosphorus and carbon turnover to uranium stress in different soil ecosystems

Journal of Hazardous Materials, Год журнала: 2025, Номер 493, С. 138383 - 138383

Опубликована: Апрель 22, 2025

Язык: Английский

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