Nitrification and simultaneous denitrification by Azospirillum brasilense 12S.
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Date
1987-03
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Abstract
Azospirillum brasilense, an associative diazotrophs from sorghum roots grows
autotrophically on NH +
4 and CaCO3. NH +
4 a is also oxidized to NO –
2 and then denitrified.
Addition of malate to the autotrophic medium enhances both NH +
4 oxidation as well as
NO –
2 dissimilation. The incomplete nitrification linked denitrification results in a rapid loss
of nitrogen from the growth medium. The bacterium also shows assimilatory NO3− and NO
2
reductases and fixes nitrogen at < 50 μg N/ml of NH +
4 , NO−3 or NO-2.
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Keywords
Azospirillum brasilense, autotrophic, heterotrophic, ammonia, nitrate, nitrification, denitrification, nitrogenase
Citation
Kundu B S, Dadarwal K R, Tauro P. Nitrification and simultaneous denitrification by Azospirillum brasilense 12S. Journal of Biosciences. 1987 Mar; 12(1): 51-54.