Differences between cell division and carbon fixation rates associated with light intensity and oxygen concentration: Implications in the cultivation of an estuarine diatom
✍ Scribed by G. D. Pruder; E. T. Bolton
- Publisher
- Springer-Verlag
- Year
- 1980
- Tongue
- English
- Weight
- 581 KB
- Volume
- 59
- Category
- Article
- ISSN
- 0025-3162
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✦ Synopsis
The effect of light intensity and oxygen concentration on the growth of an estuarine diatom was investigated. Differences between rates of cell division and net carbon fixation were found to be dependent upon light intensity and oxygen concentration. Under conditions favoring large differences between cell division and net carbon fixation cultures of Thalassiosira pseudonana clone 3H depart from exponential and enter stationary phase at low cell concentrations. It is suggested that single cell algae may not be able to balance maintenance, growth, and division outside a fairly narrow range of environmental conditions. net CO2 uptake rates were as high as one mmol 1-1h -1. The kinetics of carbon mobilization, including concentrations and chemical reaction rates of molecular transport from the gas phase, generation of CO= via dehydration and direct hydroxyl reactions, and the CO= uptake by algae were analyzed in a recent paper (Pruder and Bolton, 1979).
The research described in this paper is also directed to the consistent production of large quantities of desirable algal cells. The growth of 3H cultures was investigated under several combinations of light intensity and oxygen concentration. Differences between cell division and carbon fixation rates in given cultures were found and these differences are implicated in difficulties encountered in the cultivation of algae.