Photosynthetic Bacteria in the Marine Environment at Porto~Novo
Photosynthetic Bacteria in the Marine Environment at Porto~Novo
Date
1984
Authors
DHEVENDARAN, K
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists (India) Cochin
Abstract
Sediment and water samples were coiiected from mangrove and estuarine biotopes
at fortnightly intervals. The physico-chemical characters of the overlying water were
studied. In the mangrove biotope maximum temperature (31.5°C) and in the estuarine
biotope maximum salinity (35.6% 0
) were recorded during the summer season, whereas
in post-monsoon period the sulfate content was increased to 516 p.p.m. and the pH was
reduced to 7.4. Invariably both in the enriched sediment and water samples four
major peaks (at wavelengths 460, 705, 772 and 850 nm) and two minor peaks (at wavelengths
580 and 663 nm) of absorption spectra were noticed. A pure culture of Chromatium
sp., isolated from mangroves sediment, showed three peaks of absorption spectra
at wavelengths, 500, 580 and 850 nm. The effect of sodium chloride on the growth of
Chromatium sp., was also studied and it was observed that maximum growth occurred
in the range 1%-3% sodium chloride concentration. This isolate was also capable of
utilizing various sulfur and carbon compounds. Glycerol and glucose did not show
any specific effect whereas pyruvate, malate and acetate increased the growth.
Description
Keywords
Photosynthetic Bacteria,Marine Environment,Porto~Novo
Citation
Fishery Tech 21(2):126-130