CandidatusNitrosopolaris, a genus of putative ammonia-oxidizing archaea with a polar/alpine distribution

FEMS Microbes, Год журнала: 2022, Номер 3

Опубликована: Янв. 1, 2022

Ammonia-oxidizing archaea (AOA) are key players in the nitrogen cycle of polar soils. Here, we analyzed metagenomic data from tundra soils Rásttigáisá, Norway, and recovered four metagenome-assembled genomes (MAGs) assigned to genus 'UBA10452', an uncultured lineage putative AOA order Nitrososphaerales ('terrestrial group I.1b'), phylum Thaumarchaeota. Analysis other eight previously reported MAGs publicly available amplicon sequencing revealed that UBA10452 is predominantly found acidic alpine In particular, were more abundant highly oligotrophic environments such as mineral permafrost than nutrient-rich, vegetated harbour multiple copies genes related cold tolerance, particularly involved DNA replication repair. Based on phylogenetic, biogeographic, ecological characteristics 12 MAGs, which include a high-quality MAG (90.8% complete, 3.9% redundant) with nearly complete 16S rRNA gene, propose novel Candidatus genus, Ca. Nitrosopolaris, species representing clear biogeographic/habitat clusters.

Язык: Английский

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Response of microbial community diversity and the abundance of nitrogen-cycling genes to Bacillus subtilis application in mulberry field soil

Soil Research, Год журнала: 2024, Номер 62(2)

Опубликована: Фев. 26, 2024

Context Bacillus subtilis (BS) is a widely used microbial agent that could improve soil fertility and microenvironment. There still uncertainty about the suitability of BS for cultivating crops with high demand nitrogen fertiliser. Aims To evaluate effects on community diversity nitrogen-cycling genes in mulberry rhizosphere soil. Methods Pot experiments were conducted. Different dosages (CK, 0; T1, 0.5 × 106 CFU g−1 soil; T2, 1 T3, 2 soil) applied to irrigate The nutrient content, enzyme activity, bacterial community, determined. Key results T1 had highest Chao1 Shannon index, while T3 lowest. BS-treated samples higher relative abundance Actinobacteria Chloroflexi than CK. Specially, Sphingomonas, Reyranella, Hyphomicrobium, which was significantly positively correlated content organic matter, total soluble nitrogen, ammonium activity sucrase. involved amino acid metabolism, energy metabolism cofactors, vitamin functions also increased samples. treatment AOA-amoA nirK genes, but decreased nirS nifH genes. Conclusions An appropriate amount fertility, regulate dominant bacterium communities, affect functional cycling. Implications probably good choice cultivation fertiliser utilisation efficiency.

Язык: Английский

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Manganese reductive dissolution coupled to Sb mobilization in contaminated shooting range soil

Applied Microbiology and Biotechnology, Год журнала: 2024, Номер 108(1)

Опубликована: Апрель 10, 2024

A "redox-stat" R

Язык: Английский

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Discovery of Eremiobacterota with nifH homologues in tundra soil

Environmental Microbiology Reports, Год журнала: 2024, Номер 16(3)

Опубликована: Июнь 1, 2024

Abstract We describe the genome of an Eremiobacterota population from tundra soil that contains minimal set nif genes needed to fix atmospheric N 2 . This putative diazotroph population, which we name Candidatus Lamibacter sapmiensis, links for first time and fixation. The integrity its are well supported by both environmental taxonomic signals. Ca. sapmiensis three nifH homologues complementary nifDKENB assemble a functional nitrogenase. diazotrophic role is presence regulate fixation other involved in downstream processes such as ammonia assimilation. Similar Eremiobacterota, encodes potential chemosynthesis via CO coupled with H oxidation. Interestingly, O reductase indicates this could play sink soils. Due lack activity data, it remains uncertain if able nitrogenase participate Confirmation ability would be testament great metabolic versatility appears underlie their ecological success cold oligotrophic environments.

Язык: Английский

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Achieving efficient autotrophic nitrogen removal in anaerobic membrane bioreactor plus membrane aerated biofilm reactor by regulating nutrient ratios

Bioresource Technology, Год журнала: 2024, Номер unknown, С. 131832 - 131832

Опубликована: Ноя. 1, 2024

Язык: Английский

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