Results 161 to 170 of about 217,293 (183)

Archaea predominate among ammonia-oxidizing prokaryotes in soils

Nature, 2006
Ammonia oxidation is the first step in nitrification, a key process in the global nitrogen cycle that results in the formation of nitrate through microbial activity. The increase in nitrate availability in soils is important for plant nutrition, but it also has considerable impact on groundwater pollution owing to leaching.
S, Leininger, T, Urich, M, Schloter, L, Schwark, J, Qi, G W, Nicol, J I, Prosser, S C, Schuster, C, Schleper   +8 more
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Nitrogen Metabolism and Kinetics of Ammonia-Oxidizing Archaea

2011
The discovery of ammonia-oxidizing mesophilic and thermophilic Group I archaea changed the century-old paradigm that aerobic ammonia oxidation is solely mediated by two small clades of Beta- and Gammaproteobacteria. Group I archaea are extremely diverse and ubiquitous in marine and terrestrial environments, accounting for 20-30% of the microbial ...
Willm, Martens-Habbena, David A, Stahl
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Ammonia-oxidizing bacteria and archaea in sediments of the Gulf of Mexico

Environmental Technology, 2014
The diversity (richness and community composition) of ammonia-oxidizing archaea (AOA) and bacteria (AOB) within sediments of the Gulf of Mexico was examined. Using polymerase chain reaction primers designed to specifically target the archaeal ammonia monooxygenase-subunit (amoA) gene and bacterial amoA gene, we found AOA and AOB to be present in all ...
Flood, M, Frabutt, D, Floyd, D, Powers, A, Ezegwe, U, Devol, A, Tiquia-Arashiro, SM   +6 more
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Physiology and Genomics of Ammonia-Oxidizing Archaea

2011
This chapter is divided into two major sections: a brief comparative description of the physiology of ammonia-oxidizing archaea (AOA) in relation to the better-characterized ammonia-oxidizing bacteria (AOB); and a discussion of features that have been gleaned from the genome sequence and its relevance to environmental genomic studies.
Hidetoshi Urakawa, Willm Martens-Habbena, David A. Stahl   +2 more
openaire   +1 more source

Homologues of nitrite reductases in ammonia‐oxidizing archaea: diversity and genomic context

Environmental Microbiology, 2010
Summary Ammonia‐oxidizing archaea are frequent and ubiquitous inhabitants of terrestrial and marine environments. As they have only recently been detected, most aspects of their metabolism are yet unknown.
Bartossek, Rita, Nicol, Graeme W, Lanzen, Anders, Klenk, Hans-Peter, Schleper, Christa   +4 more
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A Critical Review on Nitrous Oxide Production by Ammonia-Oxidizing Archaea

Environmental Science & Technology, 2020
The continuous increase of nitrous oxide (N2O) in the atmosphere has become a global concern because of its property as a potent greenhouse gas. Given the important role of ammonia-oxidizing archaea (AOA) in ammonia oxidation and their involvement in N2O production, a clear understanding of the knowledge on archaeal N2O production is necessary for ...
Lan Wu, Xueming Chen, Wei Wei, Yiwen Liu, Dongbo Wang, Bing-Jie Ni   +5 more
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Ammonia-oxidizing Archaea in Kamchatka Hot Springs

Geomicrobiology Journal, 2011
Mounting evidence suggests that ammonia-oxidizing archaea (AOA) may play important roles in nitrogen cycling in geothermal environments. In this study, the diversity, distribution and ecological significance of AOA in terrestrial hot springs in Kamchatka (Far East Russia) were explored using amoA genes complemented by analysis of glycerol dialkyl ...
Weidong Zhao, Zhaoqi Song, Hongcheng Jiang, Wenjun Li, Xiaozhen Mou, Christopher S. Romanek, Juergen Wiegel, Hailiang Dong, Chuanlun L. Zhang   +8 more
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Diversity and Abundance of Ammonia-Oxidizing Bacteria and Ammonia-Oxidizing Archaea During Cattle Manure Composting

Microbial Ecology, 2010
Ammonia-oxidizing bacteria (AOB) and ammonia-oxidizing archaea (AOA) play important roles in nitrification in various environments. They may also be key communities for ammonia oxidation in composting systems, although few studies have discussed their presence. We investigated the relative diversity and abundance of AOB and AOA using cloning procedures,
Nozomi, Yamamoto, Kenichi, Otawa, Yutaka, Nakai   +2 more
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Ammonia-oxidizing activity and microbial structure of ammonia-oxidizing bacteria, ammonia-oxidizing archaea and complete ammonia oxidizers in biofilm systems with different salinities

Bioresource Technology
Ammonia-oxidizing activity of different ammonia-oxidizing microorganisms (AOMs), such as ammonia-oxidizing bacteria (AOB), ammonia-oxidizing archaea (AOA), and complete ammonia oxidizers (comammoxs), were investigated by adding the inhibitors such as 2-phenyl-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide, octyne, and KCLO3 in biofilm systems with ...
Haojie Qiu, Weihua Zhao, Yingying Qin, Yanyan Wang, Meng Bai, Shaoqing Su, Chao Wang, Zhisheng Zhao   +7 more
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Characterization of ammonia-oxidizing archaea by Raman microspectroscopy

2012
Nitrifikation ist die Oxidation von Ammonium zu Nitrit und weiter zu Nitrat. Es ist einer der wichtigsten Schritte im globalen Stickstoffkreislauf. Für lange Zeit glaubte man, dass für den ersten Schritt der Nitrifikation ausschließlich Ammoniak-oxidierende Bakterien (AOB) verantwortlich sind, jedoch wurden vor einigen Jahren die Ammoniak-oxidierenden ...
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