Results 191 to 200 of about 15,760 (212)

Variability of the transporter gene complement in ammonia-oxidizing archaea

Trends in Microbiology, 2014
Ammonia-oxidizing archaea (AOA) are a widespread and abundant component of microbial communities in many different ecosystems. The extent of physiological differences between individual AOA is, however, unknown. Here, we compare the transporter gene complements of six AOA, from four different environments and two major clades, to assess their potential
Offre P, Kerou M, Spang A, Schleper C
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pH as a Driver for Ammonia-Oxidizing Archaea in Forest Soils

Microbial Ecology, 2014
In this study, we investigated the impact of soil pH on the diversity and abundance of archaeal ammonia oxidizers in 27 different forest soils across Germany. DNA was extracted from topsoil samples, the amoA gene, encoding ammonia monooxygenase, was amplified; and the amplicons were sequenced using a 454-based pyrosequencing approach.
Stempfhuber, Barbara, Engel, Marion, Fischer, Doreen, Neskovic-Prit, Ganna, Wubet, Tesfaye, Schöning, Ingo, Gubry-Rangin, Cécile, Kublik, Susanne, Schloter-Hai, Brigitte, Rattei, Thomas, Welzl, Gerhard, Nicol, Graeme W., Schrumpf, Marion, Buscot, Francois, Prosser, James, Schloter, Michael   +15 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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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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Ammonia-oxidizing bacteria and archaea exhibit differential nitrogen source preferences

Nature Microbiology
Ammonia-oxidizing microorganisms (AOM) contribute to one of the largest nitrogen fluxes in the global nitrogen budget. Four distinct lineages of AOM: ammonia-oxidizing archaea (AOA), beta- and gamma-proteobacterial ammonia-oxidizing bacteria (β-AOB and γ-AOB) and complete ammonia oxidizers (comammox), are thought to compete for ammonia as their primary
Wei Qin, Stephany P. Wei, Yue Zheng, Eunkyung Choi, Xiangpeng Li, Juliet Johnston, Xianhui Wan, Britt Abrahamson, Zachary Flinkstrom, Baozhan Wang, Hanyan Li, Lei Hou, Qing Tao, Wyatt W. Chlouber, Xin Sun, Michael Wells, Long Ngo, Kristopher A. Hunt, Hidetoshi Urakawa, Xuanyu Tao, Dongyu Wang, Xiaoyuan Yan, Dazhi Wang, Chongle Pan, Peter K. Weber, Jiandong Jiang, Jizhong Zhou, Yao Zhang, David A. Stahl, Bess B. Ward, Xavier Mayali, Willm Martens-Habbena, Mari-Karoliina H. Winkler   +32 more
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Ammonia-Oxidizing Archaea in Marine Cold-Water Sponges

2011
Thaumarchaea (Archaea) kommen in vielen terrestrischen und marinen Lebensräumen vor und sind oftmals mit marinen Schwämmen assoziiert. Basierend auf Metagenom- und Kultivierungsstudien hat sich gezeigt, dass viele (wenn nicht sogar alle) Thaumarchaea die Fähigkeit besitzen, mittels dem Enzym Ammoniummonooxygenase (AMO), Ammonium zu oxidieren. In dieser
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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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Exploring the Energetics of Ammonia Oxidizing Archaea

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 2018
Logan H. Hodgskiss, Christa Schleper
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Ecology of ammonia-oxidizing archaea under oxygen depletion

Ammoniak-oxiderende archaea (AOA) er ubikvitære mikroorganismer, der er afhængige af ammoniak (NH₃) oxidation til nitrit (NO₂⁻) for at udvinde energi. På trods af deres afhængighed af ilt kan de findes i iltfattige marine miljøer. Nyere opdagelser har antydet, at deres tilstedeværelse i iltfattige miljøer kan forklares ved iltproduktion gennem NO ...
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Towards a genetic system for ammonia oxidizing archaea

Ammonia oxidizing archaea (AOA) play an important role in the global geochemical nitrogen cycle. They are globally distributed in diverse environments and contribute to the loss of reactive nitrogen species in agricultural soils. However, little is known about the key metabolic enzymes responsible for their main energy metabolism, the conversion of ...
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