Results 41 to 50 of about 4,632 (165)

Comparison ofnifHGene Pools in Soils and Soil Microenvironments with Contrasting Properties [PDF]

Applied and Environmental Microbiology, 2001
ABSTRACTThe similarities and differences in the structures of thenifHgene pools of six different soils (Montrond, LCSA-p, Vernon, Dombes, LCSA-c, and Thysse Kaymor) and five soil fractions extracted from LCSA-c were studied. Bacterial DNA was directly extracted from the soils, and a region of thenifHgene was amplified by PCR and analyzed by restriction.
Poly, F., Ranjard, Lionel, Nazaret, Sylvie, Gourbiere, F., Jocteur Monrozier, L.   +4 more
openaire   +3 more sources

Ecological Patterns of nifH Genes in Four Terrestrial Climatic Zones Explored with Targeted Metagenomics Using FrameBot, a New Informatics Tool

mBio, 2013
Biological nitrogen fixation is an important component of sustainable soil fertility and a key component of the nitrogen cycle. We used targeted metagenomics to study the nitrogen fixation-capable terrestrial bacterial community by targeting the gene for
Qiong Wang, John F. Quensen, Jordan A. Fish, Tae Kwon Lee, Yanni Sun, James M. Tiedje, James R. Cole   +6 more
doaj   +1 more source

Diverse and Novel nifH and nifH -Like Gene Sequences in the Deep-Sea Methane Seep Sediments of the Okhotsk Sea [PDF]

Applied and Environmental Microbiology, 2009
ABSTRACT Diverse nifH and nifH -like gene sequences were obtained from the deep-sea surface sediments of the methane hydrate-bearing Okhotsk Sea. Some sequences formed novel families of the NifH or NifH-like proteins, of currently unresolved bacterial or archaeal origin.
Hongyue, Dang, Xiwu, Luan, Jingyi, Zhao, Jing, Li   +3 more
openaire   +2 more sources

NifH- Harboring Bacterial Community Composition Across an Alaskan Permafrost Thaw Gradient

Frontiers in Microbiology, 2016
Since nitrogen (N) is often limiting in permafrost soils, we investigated the N2-fixing genetic potential and the inferred taxa harboring those genes by sequencing nifH gene fragments in samples taken along a permafrost thaw gradient in an Alaskan boreal
Christopher Ryan Penton, Christopher Ryan Penton, Caiyun Yang, Caiyun Yang, Liyou Wu, Qiong Wang, Jin Zhang, Feifei Liu, Yujia Qin, Ye Deng, Christopher L Hemme, Tianling Zheng, Edward A.G. Schuur, James M. Tiedje, Jizhong Zhou, Jizhong Zhou, Jizhong Zhou   +16 more
doaj   +1 more source

Molecular Analysis of the Microbial Guild Fixing Nitrogen in Ricefield Soils in Missouri

Microbiology Research
Non-symbiotic diazotrophic microbes are important contributors to global N budgets in cereal crops. Knowledge of the biogeography of the organisms in this functional guild increases our understanding of biological N fixation in diverse locations and ...
Prithi R. Sawli, Mark A. Buchheim, Mark A. Schneegurt   +2 more
doaj   +1 more source

Plant-Mediated Changes in Soil N-Cycling Genes during Revegetation of Copper Mine Tailings

Frontiers in Environmental Science, 2017
Nitrogen limitation represents a major bottleneck during the revegetation of mine tailings. However, controls over key nitrogen-cycling genes in rhizospheric soils under differential vegetation management remain poorly understood.
Yang Li, Zhongjun Jia, Qingye Sun, Jianhua Cheng, Yang Yang, Jing Zhan, Dan Wang   +6 more
doaj   +1 more source

Effect of ammonium concentration on methane oxidation and CO2 removal in an anaerobic biotrickling filter treating synthetic landfill gas and leachate

Journal of Chemical Technology &Biotechnology, EarlyView.
Abstract BACKGROUND Landfill gas (LFG) and leachate are commonly treated separately through energy‐intensive processes. This study evaluated the integration of both streams in an anaerobic biotrickling filter (BTF) to achieve simultaneous methane (CH4) and carbon dioxide (CO2) removal coupled with ammonium (NH4+) transformation, and how the microbial ...
Cecilia Lizeth Alvarez‐Guzmán, Karla María Muñoz‐Páez, Alejandro Vargas, Idania Valdez‐Vazquez   +3 more
wiley   +1 more source

Temporal dynamics of abundance and composition of nitrogen-fixing communities across agricultural soils.

PLoS ONE, 2013
BackgroundDespite the fact that the fixation of nitrogen is one of the most significant nutrient processes in the terrestrial ecosystem, a thorough study of the spatial and temporal patterns in the abundance and distribution of N-fixing communities has ...
Michele C Pereira E Silva, Brigitte Schloter-Hai, Michael Schloter, Jan Dirk van Elsas, Joana Falcão Salles   +4 more
doaj   +1 more source

Analysis of nifH DNA and RNA reveals a disproportionate contribution to nitrogenase activities by rare plankton-associated diazotrophs

BMC Microbiology, 2019
Background Holobionts comprising nitrogen-fixing diazotrophs and phytoplankton or zooplankton are ubiquitous in the pelagic sea. However, neither the community structure of plankton-associated diazotrophs (PADs) nor their nitrogenase transcriptional ...
Qing-Song Yang, Jun-De Dong, Manzoor Ahmad, Juan Ling, Wei-Guo Zhou, Ye-Hui Tan, Yuan-Zhou Zhang, Dan-Dan Shen, Yan-Ying Zhang   +8 more
doaj   +1 more source

The oxygen‐sensing FixLJ represses nitrogen fixation in Rhodopseudomonas palustris in response to oxygen

mLife, EarlyView.
Abstract Biological nitrogen fixation in symbiotic diazotrophs is subject to oxygen regulation by an oxygen‐sensing FixLJ two‐component system under micro‐oxic conditions. However, it remains unclear whether this mechanism is conserved in free‐living diazotrophs.
Lingwei Cui, Yan Zeng, Mengmei Wang, Lu Huang, Zheyi Wang, Ying Liu, Yanning Zheng   +6 more
wiley   +1 more source