Nitrification and simultaneous denitrification byAzospirillum brasilense 12S

descriptionPublicationkeyboard_double_arrow_right Article 01 Mar 1987 English Publisher:Springer Science and Business Media LLCJournal:Journal of Biosciences, volume 12, pages 51-54 (issn: 0250-5991, eissn: 0973-7138,

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Authors: B. S. Kundu; K. R. Dadarwal; P. Tauro;

doi: 10.1007/bf02716953

Nitrification and simultaneous denitrification byAzospirillum brasilense 12S

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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 NONH 2 - dissimilation. The incomplete nitrification linked denitrification results in a rapid loss of nitrogen from the growth medium. The bacterium also shows assimilatory NO 3 - and NO 2 - reductases and fixes nitrogen at 50 μg N/ml of NH 4 + NO 3 - or NO 2 -

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Chaudhary Charan Singh Haryana Agricultural University
India

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