• Nitrification and simultaneous denitrification byAzospirillum brasilense 12S

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    • Keywords

       

      Azospirillum brasilense ; autotrophic; heterotrophic; ammonia; nitrate; nitrite; nitrification; denitrification; nitrogenase

    • Abstract

       

      Azospirillum brasilense, an associative diazotrophs from sorghum roots grows autotrophically on NH4+ and CaCO3. NH4+ a is also oxidized to NO2- and then denitrified. Addition of malate to the autotrophic medium enhances both NH4+ oxidation as well as NONH2- dissimilation. The incomplete nitrification linked denitrification results in a rapid loss of nitrogen from the growth medium. The bacterium also shows assimilatory NO3- and NO2- reductases and fixes nitrogen at 50 μg N/ml of NH4+ NO3- or NO2-

    • Author Affiliations

       

      B S Kundu1 K R Dadarwal1 P Tauro1

      1. Department of Microbiology, Haryana Agricultural University, Hisar - 125 004, India
    • Dates

       
  • Journal of Biosciences | News

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