Results 181 to 190 of about 15,656 (209)

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
openaire   +2 more sources

Contribution of ammonia-oxidizing archaea and ammonia-oxidizing bacteria to ammonia oxidation in two nitrifying reactors

Environmental Science and Pollution Research, 2018
In this study, two laboratory nitrifying reactors (NRI and NRII), which were seeded by sludge from different sources and operated under different operating conditions, were found to possess distinct dominant ammonia-oxidizing microorganisms. Ammonia-oxidizing archaeal (AOA) amoA genes outnumbered ammonia-oxidizing bacterial (AOB) amoA genes in reactor ...
Papitchaya, Srithep, Preeyaporn, Pornkulwat, Tawan, Limpiyakorn   +2 more
openaire   +2 more sources

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
openaire   +1 more source

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
openaire   +2 more sources

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
openaire   +2 more sources

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

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
openaire   +2 more sources

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
openaire   +3 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources