Results 21 to 30 of about 6,333 (204)

Increased expression of bacterial amoA during an N2O emission peak in an agricultural field

Agriculture, Ecosystems & Environment, 2017
peer reviewedLevels of N-cycle gene transcripts (nirK, nirS, nosZ, amoA) were measured during an N2O emission peak in an agricultural soil. Automated dynamic closed chambers were used to monitor an N2O emission peak on a maize crop after a natural ...
Regaert, Donat, Heinesch, Bernard, Bodson, Bernard, Aubinet, Marc, Vandenbol, Micheline, Lognoul, Margaux, Theodorakopoulos, Nicolas, Degrune, Florine, Muys, Céline, Broux, François   +9 more
core   +3 more sources

Spatial Partitioning of Microbial Functional Potential Suggests Complex Nitrogen Cycling in a Subterranean Estuary. [PDF]

Environ Microbiol
Microbial communities in a Mediterranean subterranean estuary show spatially structured nitrogen‐cycling potential across hydrochemical zones. Microbial properties, more than environmental variables, predict NO2− and NH4+ concentrations, highlighting their key role in controlling nitrogen transformations prior to submarine groundwater discharge ...
Romano-Gude D, Arandia-Gorostidi N, Mena C, Diego-Feliu M, Almillategui B, Székely AJ, Bertilsson S, Bravo AG, Carrera J, Romera-Castillo C, Folch A, Garcia-Orellana J, Rodellas V, Ruiz-González C.   +13 more
europepmc   +2 more sources

Retraction Note to: Archaeal amoA Genes Outnumber Bacterial amoA Genes in Municipal Wastewater Treatment Plants in Bangkok [PDF]

Microbial Ecology, 2016
The contribution of ammonia-oxidizing archaea (AOA) to nitrogen removal in wastewater treatment plants (WWTPs) remains unknown. This study investigated the abundance of archaeal (AOA) and bacterial (ammonia-oxidizing bacteria (AOB)) amoA genes in eight of Bangkok’s municipal WWTPs.
Pantip, Kayee, Puntipar, Sonthiphand, Chaiwat, Rongsayamanont, Tawan, Limpiyakorn   +3 more
openaire   +3 more sources

Can Organic Amendments Override Environmental Filtering of Soil Microbiomes? Evidence From 20 Years Old Agricultural Field Trials in Contrasting Tropical Sites. [PDF]

Glob Chang Biol
Across four long‐term Kenyan maize trials, site was the dominant driver of microbial community composition and N‐cycling gene abundance. Among organic amendments, farmyard manure most strongly enriched copiotrophic taxa and raised prokaryotic diversity.
Visscher AM, Ndungu SM, Conz RF, Laub M, Mucheru-Muna MW, Mugendi D, Yegon R, Rasche F, Waswa W, Pulleman M, Vanlauwe B, Six J, Hartmann M.   +12 more
europepmc   +2 more sources

Differential regulation of amoA and amoB gene copies in Nitrosomonas europaea [PDF]

FEMS Microbiology Letters, 2000
Nitrosomonas europaea contains two nearly identical copies of the operon, amoCAB, which encodes the ammonia monooxygenase (AMO) enzyme. Cells of N. europaea containing single mutations in either amoA or amoB gene copies were incubated in ammonium both prior to and after exposure to acetylene or light.
L Y, Stein, L A, Sayavedra-Soto, N G, Hommes, D J, Arp   +3 more
openaire   +3 more sources

amoA ‐based consensus phylogeny of ammonia‐oxidizing archaea and deep sequencing of amoA genes from soils of four different geographic regions [PDF]

Environmental Microbiology, 2011
Summary Ammonia‐oxidizing archaea (AOA) play an important role in nitrification and many studies exploit their amoA genes as marker for their diversity and abundance. We present an archaeal amoA consensus phylogeny based on all ...
Pester, Michael, Rattei, Thomas, Flechl, Stefan, Gröngröft, Alexander, Richter, Andreas, Overmann, Jörg, Reinhold-Hurek, Barbara, Loy, Alexander, Wagner, Michael   +8 more
openaire   +2 more sources

Temporal and spatial coexistence of archaeal and bacterial amoA genes and gene transcripts in Lake Lucerne [PDF]

, 2013
Despite their crucial role in the nitrogen cycle, freshwater ecosystems are relatively rarely studied for active ammonia oxidizers (AO). This study of Lake Lucerne determined the abundance of both amoA genes and gene transcripts of ammonia-oxidizing ...
Vissers, E.W., Schleper, Christa, Tourna, Maria, Schleper, C., Muyzer, G., Anselmetti, Flavio S., Vissers, Elisabeth W., Muyzer, Gerard, Bodelier, Paul L.E., Laanbroek, Hendrikus J., Tourna, M., Anselmetti, F.S., Bodelier, P.L.E., Bodelier, Paul L. E., Laanbroek, H.J.   +14 more
core   +9 more sources

Global Occurrence of Archaeal amoA Genes in Terrestrial Hot Springs [PDF]

Applied and Environmental Microbiology, 2008
ABSTRACT Despite the ubiquity of ammonium in geothermal environments and the thermodynamic favorability of aerobic ammonia oxidation, thermophilic ammonia-oxidizing microorganisms belonging to the crenarchaeota kingdom have only recently been described.
Chuanlun L, Zhang, Qi, Ye, Zhiyong, Huang, Wenjun, Li, Jinquan, Chen, Zhaoqi, Song, Weidong, Zhao, Christopher, Bagwell, William P, Inskeep, Christian, Ross, Lei, Gao, Juergen, Wiegel, Christopher S, Romanek, Everett L, Shock, Brian P, Hedlund   +14 more
openaire   +2 more sources

NITRIFICATION AND NITRIFYING BACTERIA IN A COASTAL MICROBIAL MAT

Frontiers in Microbiology, 2015
The first step of nitrification, the oxidation of ammonia to nitrite, can be performed by ammonia-oxidizing archaea (AOA) or ammonium-oxidizing bacteria (AOB).
Haoxin eFan, Henk eBolhuis, Lucas eStal, Lucas eStal   +3 more
doaj   +1 more source

Transcription levels (amoA mRNA-based) and population dominance (amoA gene-based) of ammonia-oxidizing bacteria

Journal of Industrial Microbiology & Biotechnology, 2010
A population shift of ammonia-oxidizing bacteria (AOB) was described within a bench-scale activated sludge process treating an industrial wastewater in a previous report (Kuo et al. in Environ Eng Sci 23:507-520, 2006). In this investigation, transcriptional levels (amoA mRNA-based) of the three AOB groups (i.e., RI-27, B2-3, and Nitrosomonas nitrosa ...
David H-W, Kuo, Kevin G, Robinson, Alice C, Layton, Arthur J, Meyers, Gary S, Sayler   +4 more
openaire   +2 more sources