Characterization of diazotrophs containing Mo-independent nitrogenases, isolated from diverse natural environments

The studies about the molybdenum-independent nitrogenases diazotrophs isolated from wood chip mulch, soil, 'paraffin dirt', and sediments from mangrove swamps are described. Most of the isolates are found to be members of gamma subdivision of the class Proteobacteria and appear to be specifically related to fluorescent pseudomonads and azotobacteria.