Methods in Soil Biology

pp 122-134

Non-Symbiotic Nitrogen Fixation

  • S. Zechmeister-Boltenstern

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A range of microorganisms is able to reduce dinitrogen from the atmosphere and use it as a source of nitrogen for cell growth. Besides the genera Clostridium and Azotobacter, nitrogen fixing abilities have also been revealed in anaerobic phototrophic bacteria as well as in many cyanobacteria, facultative anaerobes, autotrophic and methylotrophic bacteria, and desulfurizing and methanogenic bacteria in the last decades (Schlegel 1992).