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      Effect of oxygen on the synthesis, activity and breakdown of the rhizobium denitrification system

      O'Hara, G.W.; Daniel, Roy M.; Steele, K.W.
      DOI
       10.1099/00221287-129-8-2405
      Link
       mic.sgmjournals.org
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      Citation
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      O’Hara, G.W., Daniel, R.M. & Steele, K.W. (1983). Effect of oxygen on the synthesis, activity and breakdown of the rhizobium denitrification system. Journal of General Microbiology, 129(8), 2405-2412.
      Permanent Research Commons link: https://hdl.handle.net/10289/4519
      Abstract
      The synthesis, activity and breakdown of the denitrifying enzymes of Rhizobium japonicum, R. lupini and R. meliloti were found to be regulated by O₂. Nitrogen oxide reductases were present in anaerobically grown and symbiotic R. japonicum, but in the case of organisms that had been grown aerobically the enzymes were induced only after a period of incubation under anaerobic conditions. Activity of the denitrification system that had been induced in aerobically grown cells was inhibited by O₂. Denitrification by anaerobically grown cells and bacteroids was stimulated by 5% O₂. Air inhibited denitrification completely. Little loss of denitrifying activity was shown by cells incubated in 5% O₂, but cells incubated at 10% O₂ showed a rapid loss of denitrification activity.
      Date
      1983
      Type
      Journal Article
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      • Science and Engineering Papers [3077]
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