Effect of dissolved oxygen on nitrogen fixation by A. vinelandii. I. Free cell cultures

As part of an investigation into the use of biological nitrogen fixation for fertilizer ammonia production, continuous culture studies of respiration and nitrogen fixation in the aerobic bacteria Azotobacter vinelandii under oxygen‐limited conditions were conducted. Respiration and growth rates foll...

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Veröffentlicht in:	Biotechnology and bioengineering 1984-01, Vol.26 (1), p.81-86
Hauptverfasser:	DiLuccio, Robert C., Kirwan, Donald J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Agronomy. Soil science and plant productions Azotobacter vinelandii Biological and medical sciences Biotechnology Chemical, physicochemical, biochemical and biological properties dissolved oxygen Fundamental and applied biological sciences. Psychology Methods. Procedures. Technologies Microbial engineering. Fermentation and microbial culture technology nitrogen fixation Physics, chemistry, biochemistry and biology of agricultural and forest soils Soil science
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Zusammenfassung:	As part of an investigation into the use of biological nitrogen fixation for fertilizer ammonia production, continuous culture studies of respiration and nitrogen fixation in the aerobic bacteria Azotobacter vinelandii under oxygen‐limited conditions were conducted. Respiration and growth rates followed Monod forms with respect to dissolved oxygen concentration. However, specific nitrogen fixation rate and nitrogenase activity exhibited maximum values at dissolved oxygen concentrations of ca. 0.02 mM (10% of air saturation). These results suggest careful control of oxygen in the environment is necessary to optimize fixed nitrogen production by this organism.
ISSN:	0006-3592 1097-0290
DOI:	10.1002/bit.260260115