A New Perspective on Microbes Formerly Known as Nitrite-Oxidizing Bacteria

Trends in Microbiology, Journal Year: 2016, Volume and Issue: 24(9), P. 699 - 712

Published: June 6, 2016

Language: Английский

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Microbial regulation of terrestrial nitrous oxide formation: understanding the biological pathways for prediction of emission rates

FEMS Microbiology Reviews, Journal Year: 2015, Volume and Issue: 39(5), P. 729 - 749

Published: April 30, 2015

The continuous increase of the greenhouse gas nitrous oxide (N2O) in atmosphere due to increasing anthropogenic nitrogen input agriculture has become a global concern. In recent years, identification microbial assemblages responsible for soil N2O production substantially advanced with development molecular technologies and discoveries novel functional guilds new types metabolism. However, few practical tools are available effectively reduce situ flux. Combating negative impacts fluxes poses considerable challenges will be ineffective without successfully incorporating microbially regulated processes into ecosystem modeling mitigation strategies. Here, we synthesize latest knowledge (i) key pathways regulating consumption terrestrial ecosystems critical environmental factors influencing their occurrence, (ii) relative contributions major biological emissions by analyzing natural isotopic signatures using stable isotope enrichment inhibition techniques. We argue that it is urgently necessary incorporate traits biogeochemical order estimation reliability emissions. further propose methodology oriented framework from gene scales more robust prediction future

Language: Английский

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Expanded metabolic versatility of ubiquitous nitrite-oxidizing bacteria from the genus Nitrospira

Proceedings of the National Academy of Sciences, Journal Year: 2015, Volume and Issue: 112(36), P. 11371 - 11376

Published: Aug. 24, 2015

Significance Nitrification, the sequential aerobic oxidation of ammonia via nitrite to nitrate, is a key process biogeochemical nitrogen cycle and catalyzed by two microbial guilds (nitrifiers): oxidizers nitrite-oxidizing bacteria (NOB). NOB are generally considered as metabolically restricted dependent on oxidizers. Here, we report that, surprisingly, many ecosystems ( Nitrospira ) convert urea, an important source in nature, CO 2 . Thus, supply urease-negative with receive produced return, leading reciprocal feeding interaction nitrifiers. Moreover, couple formate nitrate reduction remain active anoxia. Accordingly, unexpectedly flexible contribute cycling beyond oxidation.

Language: Английский

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Complete nitrification: insights into the ecophysiology of comammox Nitrospira

Applied Microbiology and Biotechnology, Journal Year: 2018, Volume and Issue: 103(1), P. 177 - 189

Published: Nov. 10, 2018

Nitrification, the oxidation of ammonia via nitrite to nitrate, has been considered be a stepwise process mediated by two distinct functional groups microorganisms. The identification complete nitrifying Nitrospira challenged not only paradigm labor division in nitrification, it also raises fundamental questions regarding environmental distribution, diversity, and ecological significance nitrifiers compared canonical Recent genomic physiological surveys identified factors controlling their ecology niche specialization, which thus potentially regulate abundances population dynamics different guilds. This review summarizes recently obtained insights into metabolic differences known discusses these light potential adaptation differentiation between nitrifiers.

Language: Английский

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Carbon nanomaterials alter plant physiology and soil bacterial community composition in a rice-soil-bacterial ecosystem

Environmental Pollution, Journal Year: 2017, Volume and Issue: 232, P. 123 - 136

Published: Sept. 22, 2017

Language: Английский

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Proteomics and comparative genomics of Nitrososphaera viennensis reveal the core genome and adaptations of archaeal ammonia oxidizers

Proceedings of the National Academy of Sciences, Journal Year: 2016, Volume and Issue: 113(49)

Published: Nov. 18, 2016

Significance Ammonia-oxidizing archaea (AOA), key players in global biogeochemical cycles, represent a heterogeneous group with broad environmental distribution. Understanding their activity and physiology is of great importance due to the impact overuse agricultural fertilizers on N cycle production greenhouse gas 2 O during nitrification. Despite prominent ecological role, little known about fundamental metabolic processes AOA. Here, we show that AOA marine terrestrial environments share unique well-conserved pathways carbon nitrogen metabolism, raise hypotheses missing steps these pathways. Our approach also highlights extensive adaptations soil clade, including capacity for cell surface modifications, carbohydrate conversions, detoxification, biofilm formation.

Language: Английский

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Bacillus subtilis biofertilizer mitigating agricultural ammonia emission and shifting soil nitrogen cycling microbiomes

Environment International, Journal Year: 2020, Volume and Issue: 144, P. 105989 - 105989

Published: July 30, 2020

Excessive ammonia (NH3) emitted from nitrogen fertilizer application in farmland have caused serious disturbance to global environment, including reduction of visibility, formation regional haze, and increase deposition. Application biofertilizer has been considered as an effective approach for soil improvement agriculture sustainability. In this study, a field experiment was conducted evaluate the potential B. subtilis on mitigating NH3 volatilization investigate underlying mechanisms. Compared with organic fertilizer, incorporation reduced by up 44%. Moreover, abundance ureC gene, increased functional genes (bacterial amoA comammox amoA) ammonia-oxidizing bacteria (AOB). This indicated that conversion NH4+-N decreased nitrification process increased. brief, "source" "sink" NH4+-N, thus reducing retention alkaline soil, volatilization. These results is control strategy agricultural emission, maintaining high crop yield environmental disturbance.

Language: Английский

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Controlled-release nitrogen fertilizer application mitigated N losses and modified microbial community while improving wheat yield and N use efficiency

Agriculture Ecosystems & Environment, Journal Year: 2023, Volume and Issue: 349, P. 108445 - 108445

Published: March 10, 2023

Language: Английский

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Prospects for Biological Nitrogen Removal from Anaerobic Effluents during Mainstream Wastewater Treatment

Environmental Science & Technology Letters, Journal Year: 2015, Volume and Issue: 2(9), P. 234 - 244

Published: Aug. 24, 2015

Growing interest in the anaerobic treatment of domestic wastewater requires a parallel focus on developing downstream technologies that address nitrogen pollution, especially for systems located eutrophication-impacted watersheds. Anaerobic effluents contain sulfide and hydrogen (a corrosive gas), dissolved methane potent greenhouse ammonium, residual organic carbon predominantly form volatile fatty acids. Conventional approaches to removal are energy- chemical-intensive not appropriate application effluents. Innovative, energy efficient processes being developed involve several novel chemotrophic processes. This review provides information about these processes, identifies how control retain most desirable microorganisms, considers impact reactor configuration performance. Given complexity under development remove from anaerobically treated wastewater, we conclude computational models can support their sensor-mediated controls essential achieving efficiency.

Language: Английский

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Biotic Interactions in Microbial Communities as Modulators of Biogeochemical Processes: Methanotrophy as a Model System

Frontiers in Microbiology, Journal Year: 2016, Volume and Issue: 7

Published: Aug. 23, 2016

Microbial interaction is an integral component of microbial ecology studies, yet the role, extent, and relevance in community functioning remains unclear, particularly context global biogeochemical cycles. While many studies have shed light on physico-chemical cues affecting specific processes, (micro)biotic controls interactions potentially steering communities leading to altered are less known. Yet, recent accumulating evidence suggests that concerted actions a can be significantly different from combined effects individual microorganisms, giving rise emergent properties. Here, we exemplify importance for ecosystem processes by analysis reasonably well-understood guild, namely, aerobic methane-oxidizing bacteria (MOB). We reviewed literature which provided compelling modulating methane oxidation. Support associations within methane-fed sought re-analysis data derived stable isotope probing various complex environmental settings. Putative positive between active MOB other microbes were assessed correlation network-based with datasets covering diverse environments where closely interacting members consortium alter oxidation activity. Although methanotrophy used as model system, fundamentals our postulations may applicable guilds mediating processes.

Language: Английский

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