Nitrogenase-Relevant Reactivity of a Synthetic Iron–Sulfur–Carbon Site
Simple synthetic compounds with only S and C donors offer a ligation environment similar to the active site of nitrogenase (FeMoco) and thus demonstrate reasonable mechanisms and geometries for N2 binding and reduction in nature. We recently reported the
Serena DeBeer (1325124) +5 more
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Adaptability of a nitrogen-fixing strain W12 to the diverse environmental factors
Effects of diverse environmental factors on the growth and nitrogenase activity of a nitrogenfixing bacteria strain W12 were investigated in our experiment.
ZHANG Li-mei, FANG Ping, JI Tian-wei
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The photosynthetic α‐proteobacterium Rhodobacter capsulatus reduces and thereby fixes atmospheric dinitrogen (N2) by a molybdenum (Mo)‐nitrogenase and an iron‐only (Fe)‐nitrogenase.
Lisa Demtröder +2 more
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Oxygen inhibition of nitrogenase activity in Klebsiella pneumoniae [PDF]
A purpose-built oxystat has been used to study reversible inhibition of nitrogenase by O2 in the facultative anaerobe Klebsiella pneumoniae. C2H2-reducing activity in samples from either an anaerobic glucose-limited or an O2-limited diazotrophic chemostat culture was completely inhibited by exposure to a dissolved O2 concentration (DOC) of 1.5 microM ...
E P, Kavanagh, S, Hill
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Nodule Invasion and Symbiosome Differentiation During Rhizobium etli-Phaseolus vulgaris Symbiosis
By means of a detailed ultrastructural analysis of nodules induced by Rhizobium etli on the roots of Phaseolus vulgaris, we observe that the development of host-invaded cells is not synchronous.
Michele Cermola +5 more
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In Anabaena variabilis, the nif1 genes, which are activated by CnfR1, produce a Mo-nitrogenase that is expressed only in heterocysts. Similarly, the nif2 genes, which are activated by CnfR2, make a Mo-nitrogenase that is expressed only in anaerobic ...
Brenda S. Pratte, Teresa Thiel
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Phosphate solubilizing bacteria stimulate wheat rhizosphere and endosphere biological nitrogen fixation by improving phosphorus content [PDF]
Phosphate (P) availability often limits biological nitrogen fixation (BNF) by diazotrophic bacteria. In soil, only 0.1% of the total P is available for plant uptake.
Yongbin Li +3 more
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Mutational and Transcriptional Analysis of the Type III Secretion System of Bradyrhizobium japonicum
Sequencing the symbiotic region of Bradyrhizobium japonicum revealed a gene cluster (tts) encoding a type III secretion system (TTSS) that is similar to those found in Mesorhizobium loti MAFF303099 and Rhizobium strain NGR234.
Andrea Krause +2 more
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Dependence of nitrogenase switch-off upon oxygen stress on the nitrogenase activity in Azotobacter vinelandii [PDF]
Azotobacter vinelandii was grown diazotrophically in chemostat cultures limited by sucrose, citrate, or acetate. Specific activities of cellular oxygen consumption (qO2) and nitrogenase (acetylene reduction) were measured in situ at different dilution rates (D, representing the specific growth rate mu at steady state).
J, Kuhla, J, Oelze
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Protection of nitrogenase levels in dark-incubated cultures of Anabaena sp. strain CA by various carbon sources, and restoration of nitrogenase activity by oxygen [PDF]
Photoautotrophically grown, nitrogen-fixing cultures of Anabaena sp. strain CA lost nitrogenase activity completely after 4 h of incubation in the dark.
Kumar, Dhruv, Kumar, Har Darshan
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