Article

Biotechnology Letters

, Volume 17, Issue 2, pp 225-228

First online:

Inhibitory effect of oxygen accumulation on the growth of Spirulina platensis

  • Facundo J. MarquezAffiliated withDepartment of Fermentation Technology, Faculty of Engineering, Hiroshima University
  • , Ken SasakiAffiliated withHiroshima-Denki Institute of Technology, Nakano
  • , Naomichi NishioAffiliated withDepartment of Fermentation Technology, Faculty of Engineering, Hiroshima University
  • , Shiro NagaiAffiliated withDepartment of Fermentation Technology, Faculty of Engineering, Hiroshima University

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Summary

The growth of Spirulina platensis was studied in a light-limited culture under various dissolved oxygen (DO) concentrations. At high DO concentration, e.g. at 1.25 mM DO, the growth rate was decreased up to 36 % compared with that of 0.063 mM DO. The retarded growth rate at high DO concentrations seemed to be coupled with the degeneration of photosynthetic activity in terms of O2 evolution. Under higher DO concentrations, superoxide dismutase and ascorbate peroxidase activities tended to increase, while the contents of photosynthetic pigment, such phycocyanin, carotenoid and chlorophyll-a decreased distinctly.