Effects of pH on the growth rate, motility and photosynthesis in Euglena gracilis
Language English Country United States Media print
Document type Journal Article
PubMed
11898347
DOI
10.1007/bf02818001
Knihovny.cz E-resources
- MeSH
- Euglena gracilis growth & development physiology MeSH
- Photosynthesis * MeSH
- Hydrogen-Ion Concentration MeSH
- Potassium Cyanide MeSH
- Movement MeSH
- Oxygen Consumption MeSH
- Animals MeSH
- Check Tag
- Animals MeSH
- Publication type
- Journal Article MeSH
- Names of Substances
- Potassium Cyanide MeSH
The influence of pH 3-10 on the growth, motility and photosynthesis in Euglena gracilis was demonstrated during a 7-d cultivation. The cells did not survive at pH < 4 and > 8, highest growth rate being detected at pH 7. Motility followed a similar pattern as growth rate. Photosynthetic response curves were shown to be of the same type over the whole pH range. High respiration was characteristic for cells grown at pH 5 and 6, the lowest one at 7. At high and also at low pH more active respiration was found which can be considered as a protective response on proton stress. Respiration was not completely inhibited with potassium cyanide. Photosynthesis was the most effective at pH 6; lower and higher pH decreased photosynthetic efficiency. pH affected more the growth rate than the photosynthesis.
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