Nitrogen-fixing microorganisms

Zehr, J. P., Mellon, M. T., and Zani, S. (1998). New nitrogen-fixing microorganisms detected in oligotrophic oceans by the amplification of nitrogenase (nifH) genes. Appl. Environ. Microbiol. 64, 3444-3450. 

Zehr, J. P., Carpenter, E. J., and Villareal, T. A. (2000). New perspectives on nitrogen-fixing microorganisms in tropical and subtropical ocean. Trends Microbiol. 8, 68—73. 

AfFourtit, J., Zehr, J. P., and Paerl, H. W. (2001). Distribution of nitrogen-fixing microorganisms along the Neuse River estuary, North Carolina. Microb. Ecol. 41, 114—123. 

In most nitrogen-fixing microorganisms, the eight high-potential electrons come from reducedferredoxin, generated by photosynthesis or oxidative processes. Two molecules of ATP are hydrolyzed for each electron transferred. Thus, at... 

Normand P and Bousquet J. (1989). Phylogeny of nitrogenase sequences in Frankia and other nitrogen-fixing microorganisms. J. Mol. Evol. 29,436-447. 

Microbial (biotic) fixation of atmospheric N2 is the most important natural nitrogen source for the biosphere. Nitrogen-fixing microorganisms in terrestrial and oceanic ecosystems prodnce ammonia following the basic... 

The total amount of dinitrogen fixed on a global basis is estimated at about 2.4 X 10 tons per year, and some 65% of this is pursued by nitrogen-fixing microorganisms. While the industrial Haber process, which accounts for about 25% of the total, is carried out at high temperatures (300-400°C) and pressures (350-1000 atm), the natural biological fixation proceeds under ambient conditions. 

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