Archaeal and bacterial ammonia-oxidisers in soil: the quest for niche specialisation and differentiation

Trends in Microbiology, Год журнала: 2012, Номер 20(11), С. 523 - 531

Опубликована: Сен. 7, 2012

Язык: Английский

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

FEMS Microbiology Reviews, Год журнала: 2015, Номер 39(5), С. 729 - 749

Опубликована: Апрель 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

Язык: Английский

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Diversity, Physiology, and Niche Differentiation of Ammonia-Oxidizing Archaea

Applied and Environmental Microbiology, Год журнала: 2012, Номер 78(21), С. 7501 - 7510

Опубликована: Авг. 25, 2012

Nitrification, the aerobic oxidation of ammonia to nitrate via nitrite, has been suggested have a central part global biogeochemical nitrogen cycle since oxygenation Earth. The cultivation several ammonia-oxidizing archaea (AOA) as well discovery that archaeal monooxygenase (amo)-like gene sequences are nearly ubiquitously distributed in environment and outnumber their bacterial counterparts many habitats fundamentally revised our understanding nitrification. Surprising insights into physiological distinctiveness AOA mirrored by recognition phylogenetic uniqueness these microbes, which fall within novel phylum now known Thaumarchaeota. relative importance nitrification, compared bacteria (AOB), is still under debate. This minireview provides synopsis current knowledge diversity physiology AOA, factors controlling ecology, role carbon cycling potential involvement production greenhouse gas nitrous oxide. It emphasizes activity-based analyses studies formulates priorities for future research.

Язык: Английский

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Archaea in Biogeochemical Cycles

Annual Review of Microbiology, Год журнала: 2013, Номер 67(1), С. 437 - 457

Опубликована: Июнь 29, 2013

Archaea constitute a considerable fraction of the microbial biomass on Earth. Like Bacteria they have evolved variety energy metabolisms using organic and/or inorganic electron donors and acceptors, many them are able to fix carbon from sources. thus play crucial roles in Earth's global geochemical cycles influence greenhouse gas emissions. Methanogenesis anaerobic methane oxidation important steps cycle; both performed exclusively by archaea. Oxidation ammonia nitrite is Thaumarchaeota. They represent only archaeal group that resides large numbers aerobic terrestrial marine environments Sulfur-dependent archaea confined mostly hot environments, but metal leaching acidophiles reduction sulfate anaerobic, nonthermophilic oxidizers potential impact environment. The number archaea, particular those dominating subsurface, remain be explored.

Язык: Английский

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Nitrification and nitrifiers in acidic soils

Soil Biology and Biochemistry, Год журнала: 2017, Номер 116, С. 290 - 301

Опубликована: Ноя. 5, 2017

Язык: Английский

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The consequences of niche and physiological differentiation of archaeal and bacterial ammonia oxidisers for nitrous oxide emissions

The ISME Journal, Год журнала: 2018, Номер 12(4), С. 1084 - 1093

Опубликована: Янв. 25, 2018

Abstract High and low rates of ammonium supply are believed to favour ammonia-oxidising bacteria (AOB) archaea (AOA), respectively. Although their contrasting affinities for suggested account these differences, the influence ammonia concentration on AOA AOB has not been tested under environmental conditions. In addition, while both contribute nitrous oxide (N2O) emissions from soil, N2O yields (N2O–N produced per NO2−–N generated oxidation) lower, suggesting lower when dominate oxidation. This study hypothesis that supplied continuously at is preferentially oxidised by AOA, with yield than expected AOB-dominated processes. Soil microcosms were water, urea or a slow release, urea-based fertiliser 1-octyne (inhibiting only AOB) was applied distinguish activity associated production. Low supply, mineralisation organic matter, fertiliser, led growth, oxidation production only, yield. free within after growth groups, but twofold greater dominated AOA. therefore demonstrates high concentration, confirms dominance during suggests release fertilisers potentially mitigate through differences in niche specialisation mechanisms AOB.

Язык: Английский

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Current insights into the autotrophic thaumarchaeal ammonia oxidation in acidic soils

Soil Biology and Biochemistry, Год журнала: 2012, Номер 55, С. 146 - 154

Опубликована: Июнь 19, 2012

Язык: Английский

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Archaea produce lower yields of N₂O than bacteria during aerobic ammonia oxidation in soil

Environmental Microbiology, Год журнала: 2016, Номер 19(12), С. 4829 - 4837

Опубликована: Март 14, 2016

Nitrogen fertilisation of agricultural soil contributes significantly to emissions the potent greenhouse gas nitrous oxide (N2 O), which is generated during denitrification and, in oxic soils, mainly by ammonia oxidisers. Although laboratory cultures oxidising bacteria (AOB) and archaea (AOA) produce N2 O, their relative activities are unknown. This work tested hypothesis that AOB dominate oxidation O production under conditions high inorganic (NH3 ) input, but result from activity AOA when NH3 derived mineralisation. 1-octyne, a recently discovered inhibitor AOB, was used distinguish resulting archaeal bacterial microcosms, specifically inhibited growth, production. In unamended were lower resulted AOA. The yield nitrite produced half likely due additional enzymatic mechanisms latter, directly linked all treatments. Relative contributions production, therefore, reflect respective oxidation. These results suggest potential mitigation strategies for fertilised soils.

Язык: Английский

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Nitrogen transformations in aquaponic systems: A review

Aquacultural Engineering, Год журнала: 2017, Номер 76, С. 9 - 19

Опубликована: Янв. 1, 2017

Язык: Английский

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Meta-analysis reveals ammonia-oxidizing bacteria respond more strongly to nitrogen addition than ammonia-oxidizing archaea

Soil Biology and Biochemistry, Год журнала: 2016, Номер 99, С. 158 - 166

Опубликована: Май 24, 2016

Язык: Английский

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