Results 21 to 30 of about 839 (152)

Comammox Nitrospira Clade B is the most abundant complete ammonia oxidizer in a dairy pasture soil and inhibited by dicyandiamide and high ammonium concentrations

Frontiers in Microbiology, 2022
The recent discovery of comammox Nitrospira, a complete ammonia oxidizer, capable of completing the nitrification on their own has presented tremendous challenges to our understanding of the nitrification process.
Pei-Chun (Lisa) Hsu, Hong J. Di, Keith Cameron, Andriy Podolyan, Henry Chau, Jiafa Luo, Blair Miller, Sam Carrick, Paul Johnstone, Scott Ferguson, Wenhua Wei, Jupei Shen, Limei Zhang, Hongbin Liu, Tongke Zhao, Wenxue Wei, Weixin Ding, Hong Pan, Yimeng Liu, Bowen Li   +19 more
doaj   +1 more source

Community composition and abundance of complete ammonia oxidation (comammox) bacteria in the Lancang River cascade reservoir

Ecotoxicology and Environmental Safety, 2023
The construction of the reservoir has changed the nitrogen migration and transformation processes in the river, and a large amount of sediment deposition in the reservoir may also lead to the spatial differentiation of complete ammonia oxidation ...
Hang Ding, Jiahui Zhang, Yuchun Wang, Mingming Hu, Jie Wen, Shanze Li, Yufei Bao, Jianwei Zhao   +7 more
doaj   +1 more source

Unusual Plastoquinones in Non-Phototrophic Nitrifying Bacteria. [PDF]

Environ Microbiol Rep
Chemolithoautotrophic nitrifying bacteria of the genus Nitrospira exclusively possess unusual methyl‐plastoquinones with a standard redox potential below that of canonical plastoquinone and ubiquinone, suggesting functional roles in bidirectional electron transport.
Bale NJ, Fujimura H, Pjevac P, Koenen M, Ikeda H, Itagaki S, Yamamoto Y, Palmetzhofer J, Sedlacek CJ, Palabikyan H, Sinninghe Damsté JS, Wagner M, Shiigi H, Daims H.   +13 more
europepmc   +2 more sources

Hydrazine Synthase From Anammox Is Inhibited by Linear and Aromatic Alkynes. [PDF]

Environ Microbiol
Linear and aromatic alkynes inhibit anammox in culture and in wetlands. The inhibition by alkynes is specific to the hydrazine synthase, a key enzyme in the anammox pathway. ABSTRACT N2O emissions by nitrifiers are often estimated using selective inhibitors, such as 1‐alkynes.
Maryan C, Nuijten GHL, Crombie AT, Lücker S, Gibson V, Hernández M, Murrell JC, Lehtovirta-Morley LE.   +7 more
europepmc   +2 more sources

Salinity changes the nitrification activity and community composition of comammox Nitrospira in intertidal sediments of Yangtze River estuary

mSystems, 2023
The newly discovered complete ammonia-oxidizing (comammox) Nitrospira has been identified in different environments, including coastal environments, where salinity is one of the most important factors for the abundance and activity of nitrifiers.
Ran Jiang, Wen-Jing Qin, Ru-Yi Zhang, Kai Zhang, Xing Huang, Yong Li, Chen-Hao Zhou, Ting Zhu, Yan Zhang, Bin Zou, Ming Nie, Sung-Keun Rhee, Zhe-Xue Quan   +12 more
doaj   +1 more source

Photoinhibition of comammox reaction in Nitrospira inopinata in a dose- and wavelength-dependent manner

Frontiers in Microbiology, 2022
Apparent contribution of complete ammonia-oxidizing organisms (comammox) to the global nitrogen cycle highlights the necessity for understanding niche differentiation of comammox bacteria among other ammonia oxidizers. While the high affinity for ammonia
Ekaterina Y. Gottshall, Bruce Godfrey, Bo Li, Britt Abrahamson, Wei Qin, Mari Winkler   +5 more
doaj   +1 more source

Abundance and Niche Differentiation of Comammox in the Sludges of Wastewater Treatment Plants That Use the Anaerobic–Anoxic–Aerobic Process

Life, 2022
Complete ammonia oxidizers (comammox), which directly oxidize ammonia to nitrate, were recently identified and found to be ubiquitous in artificial systems.
Sheng-Nan Zhang, Jian-Gong Wang, Dan-Qi Wang, Qiu-Yue Jiang, Zhe-Xue Quan   +4 more
doaj   +1 more source

Diversity and abundance of comammox bacteria in the sediments of an urban lake [PDF]

Journal of Applied Microbiology, 2020
Although comammox have been discovered in a variety of ecosystems, there are few studies in urban lakes. This paper attempted to confirm whether this ammonia-oxidizing microbe exists in urban lakes and to determine the factors influencing its existence.This study investigated the diversity and abundance of comammox bacteria in sediments of a typical ...
Y. Xu, J. Lu, Y. Wang, G. Liu, X. Wan, Y. Hua, D. Zhu, J. Zhao   +7 more
openaire   +3 more sources

Differential responses of canonical nitrifiers and comammox Nitrospira to long-term fertilization in an Alfisol of Northeast China

Frontiers in Microbiology, 2023
The newly identified complete ammonia oxidizer (comammox) that converts ammonia directly into nitrate has redefined the long-held paradigm of two-step nitrification mediated by two distinct groups of nitrifiers.
Yanan Wang, Xibai Zeng, Qiang Ma, Yang Zhang, Wantai Yu, Zhong Zheng, Nan Zhang, Liyang Xu   +7 more
doaj   +1 more source

Complete nitrification: insights into the ecophysiology of comammox Nitrospira [PDF]

Applied Microbiology and Biotechnology, 2018
Nitrification, the oxidation of ammonia via nitrite to nitrate, has been considered to be a stepwise process mediated by two distinct functional groups of microorganisms. The identification of complete nitrifying Nitrospira challenged not only the paradigm of labor division in nitrification, it also raises fundamental questions regarding the ...
Hanna Koch, Maartje A. H. J. van Kessel, Sebastian Lücker   +2 more
openaire   +4 more sources