Results 141 to 150 of about 3,077 (184)

Description and Classification of Diazotrophs

1975
In comparative biology it is normally observed that organisms possessing a common function also tend to have certain distinguishing physiological, metabolic, structural and genetic characteristics. The organisms which can use N2 to meet their nitrogen requirement, however, appear to violate this rule: except for the ability to fix N2, these organisms ...
Richard C. Burns, Ralph W. F. Hardy
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Biogeography of diazotrophic bacteria in soils

World Journal of Microbiology and Biotechnology, 2010
This study evaluated diazotrophic bacterial diversity of soils from four different sites in South and North America. Approximately one hundred and thirty-nine thousand partial sequences of the small subunit of the bacterial ribosomal RNA gene generated for a previous study were used for this work.
Luiz Fernando Wurdig Roesch, Roberta R. Fulthorpe, Rodrigo Josemar Seminoti Jaccques, Fátima Menezes Bento, Flávio Anastácio de Oliveira Camargo   +4 more
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Nitrogen fixation and diazotroph diversity in groundwater systems

The ISME Journal, 2023
Abstract Biological nitrogen fixation (BNF), the conversion of N2 into bioavailable nitrogen (N), is the main process for replenishing N loss in the biosphere. However, BNF in groundwater systems remains poorly understood. In this study, we examined the activity, abundance, and community composition of diazotrophs in groundwater in the ...
Xiaohan Liu, Ping Li, Helin Wang, Li-Li Han, Kai Yang, Yanhong Wang, Zhou Jiang, Li Cui, Shuh-Ji Kao   +8 more
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Diversity of Nitrogenase Systems in Diazotrophs

Journal of Integrative Plant Biology, 2006
AbstractNitrogenase is a metalloprotein complex that catalyses the reaction of biological nitrogen fixation. At least three genetically distinct nitrogenase systems have been confirmed in diazotrophs, namely Nif, Vnf, and Anf, in which the active‐site central metals are Mo, V, and Fe, respectively. The present review summarizes progress on the genetic,
Ying Zhao, Shao‐Min Bian, Hui‐Na Zhou, Ju‐Fu Huang   +3 more
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Light-dark fluctuated metabolic features of diazotrophic and non-diazotrophic cyanobacteria and their coexisting bacteria

Science of The Total Environment
Cyanobacteria, the most abundant photosynthetic organisms in oceans, are tightly associated with diverse microbiota. However, the relationships between heterotrophic bacteria and cyanobacteria, particularly the diazotrophic group, are not fully understood.
Hao, Zhang, Yehui, Tan, Youping, Zhou, Jiaxing, Liu, Xiaomin, Xia   +4 more
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Osmotolerance of diazotrophic rhizosphere bacteria

Plant and Soil, 1991
In the genus Azospirillum tolerance towards high concentrations of sodium chloride, sucrose or polyethylene glycol increased in the order A. amazonense A. lipoferum A. brasilense and A. halopraeferens. In A. brasilense and A. halopraeferens the compatible solutes trehaloseglutamate and an unknown compound were identified. A.
A. Hartmann, S. R. Prabhu, E. A. Galinski   +2 more
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Diazotrophs and Their Activity in Maize and Wheat

1998
Diazotrophs are microorganisms which, in association with plants, are capable of fixing 30–60 and even up to 150 kg of N ha−1, bringing yield increases of the crops grown of 5–15% (Maltseva et al., 1995; Govedarica et al., 1997).
M. Govedarica, N. Milosevic, M. Jarak, Z. Jelicic, R. Protic   +4 more
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The rice endophytic diazotroph and PGPR

1998
The selective pressure of the rhizoplane of rice plants for colonized beneficial rhizobacteria has been investigated. The rhizobacteria were isolated from the rhizoplane of rice variety Yue Guang (with a middling disease-resistant trait) and Yue Fu (with a high yield trait).
W. Song, H. L. Yang, X. L. Sun, Y. S. Wang, Y. D. Wang, Z. H. Chen   +5 more
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Ecology and Microbiology of Symbiotic Diazotrophs

1984
Nodulation of legumes by rhizobia occurs in a series of steps which include: (1) rhizobial growth in the plant rhizosphere; (2) attachment of the rhizobia to roothairs of the legume; (3) rhizobial induced root-hair curling; (4) infection thread formation within the root hairs (5) growth of the ...
W. J. Broughton, U. Samrey, C. E. Pankhurst, G. M. Schneider, C. P. Vance   +4 more
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Genomic Manipulations of the Diazotroph Azotobacter vinelandii

2018
The biological reduction of nitrogen gas to ammonia is limited to a select group of nitrogen-fixing prokaryotes. While nitrogenase is the catalyst of nitrogen fixation in these biological systems, a consortium of additional gene products is required for the synthesis, activation, and catalytic competency of this oxygen-sensitive metalloenzyme.
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