منابع مشابه
Kinetics of Nif gene expression in a nitrogen-fixing bacterium.
Nitrogen fixation is a tightly regulated trait. Switching from N2 fixation-repressing conditions to the N2-fixing state is carefully controlled in diazotrophic bacteria mainly because of the high energy demand that it imposes. By using quantitative real-time PCR and quantitative immunoblotting, we show here how nitrogen fixation (nif) gene expression develops in Azotobacter vinelandii upon dere...
متن کاملHydrogenase and Nitrogenase in a Nitrogen-fixing Bacterium.
Interesting observations on intensity-dependent absorption of light have been reported by Bret and Gires,' who have not given a theoretical interpretation of their results. This note provides a simple discussion of the probable mechanism of the effects observed as being due to optical pumping by the absorbed light. Their work was done with a Q-spoiled ruby laser which provides flashes of X6943 ...
متن کاملGrowth characteristics of a novel nitrogen-fixing cellulolytic bacterium.
Growth characteristics of a cellulolytic nitrogen-fixing bacterium isolated from a marine shipworm by Waterbury et al. (J. B. Waterbury, C. B. Calloway, and R. D. Turner, Science 221:1401-1403, 1983) are described. When grown microaerobically, the bacterium exhibited doubling times of about 2 days in cellulose-supplemented synthetic medium devoid of combined nitrogen. Maximum growth was reached...
متن کامل(Methyl)ammonium transport in the nitrogen-fixing bacterium Azospirillum brasilense.
An ammonium transporter of Azospirillum brasilense was characterized. In contrast to most previously reported putative prokaryotic NH4+ transporter genes, A. brasilense amtB is not part of an operon with glnB or glnZ which, in A. brasilense, encode nitrogen regulatory proteins PII and PZ, respectively. Sequence analysis predicts the presence of 12 transmembrane domains in the deduced AmtB prote...
متن کاملNitrogen Fixing
Blue Green Algae (BGA) have the capacity to self generate photosynthates from CO and 2 water. It is gratifying to note that Aulosira is the most important alga of the rice fields of India. Algalization has been found to benefit all the growth parameters. The propagation of BGA enriches the N status of soil and also provides organic matter and biological quotient 2 substances for plant growth. T...
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ژورنال
عنوان ژورنال: Nature
سال: 1959
ISSN: 0028-0836,1476-4687
DOI: 10.1038/1841743a0