Studies on cultural conditions of marine Chromatium buderi Truper and Jannasch 1968
Photosynthetic characteristics of a purple sulfur bacterium, Chromatium buderi, cultured under different ranges of pH, temperature, light intensities and ammonium chloride concentrations were examined. Maximum bacteriochlorophyll a synthesis was observed at pH 6.5 whereas the optimum growth was at pH 8.0. In general, higher temperature tended to inhibit the chlorophyll a synthesis and growth. 30°C is the optimum temperature both for chlorophyll a synthesis and growth. At 25µE mˉ²Sˉ¹ the bacteriochlorophyll a content and growth attained maximum level. The response to this low light intensity is an adaptation that ensures a high photosynthetic rate for the purple sulfur bacterium that usually occurs in dimly lit environment. Besides these, ammonium chloride at low concentration enhances both chlorophyll a synthesis and growth. Above 0.5% of it causes the nitrogen-chlorosis and also retards the growth of the bacterium. Possible chemical and structural mechanisms involved are discussed.
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| Format: | article biblioteca |
| Language: | English |
| Published: |
1988
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| Subjects: | Aquaculture, Biology, photosynthesis, laboratory culture, controlled conditions, pH effects, environmental effects, Chromatium buderi, purple sulfur bacteria, |
| Online Access: | http://hdl.handle.net/1834/34051 |
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