Francis, M S; Dr. Babu, Philip(Cochin University Of Science And Technology, October 26, 1995)
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Abstract:
The group cyanobacteria includes a large number of organisms
characterised by a low state of cellular organization. Their cells lack a
well defined nucleus. Cell division is by division of the protoplast by an
ingrowth of the septum. These organisms are characterised generally by a
blue green colouration of the cell, the chief pigments being chlorophyll-a,
carotenes, xanthophylls, C phycocyanin and C phycoerythrin. The product of
photosynthesis is glycogen. These organisms lack flagellate reproductive
bodies and there is a total lack of sexual reproduction. They are also
unique because of the presence of murein in the place of cellulose (cell
wall) and the absence of chloroplast, mitochondria and endoplasmic
reticulum. Just like bacteria some of them possess Plasmids and can fix
atmospheric nitrogen.
In the present study growth kinetics, heavy metal tolerance,
tolerance mechanisms, heavy metal intake, and antibacterial activity of
§ynechocystics salina Wislouch - a nanoplanktonic, euryhaline,
Cyanobacterium present in Cochin back waters has been carried out for the
potential biotechnological application of this organism. _§; salina occur
as small spherical cells of 3n diameter (sometimes in pairs) with bluish
green colour. The species is characterised by jerky movement of the cells
and is structrually similar to other cyanobacteria
Description:
Division of Marine Biology, Microbiology
and Biochemistry, School of Marine Sciences,Cochin University of Science and Technology
Sincy,Joseph; Saramma, A V(Department of Marine Biology, Microbiology and biochemistry, September , 2005)
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Abstract:
The main objectives of the present investigation were to evaluate the qualitative and quantitative distribution of natural cyanobacterial population and their ecobiological properties along the Cochin estuary and their application in aquaculture systems as a nutritional supplement due to their nutrient-rich biochemical composition and antioxidant potential. This thesis presents a detailed account of the distribution of cyanobacteria in Cochin estuary, an assessment of physico-chemical parameters and the nutrients of the study site, an evaluation of the effect of physico-chemical parameters on cyanobacterial distribution and abundance, isolation, identification and culturing of cyanobacteria, the biochemical composition an productivity of cyanobacteria, and an evaluation of the potential of the selected cyanobacteria as antioxidants against ethanol induced lipid peroxidation. The pH, salinity and nutritional requirements were optimized for low-cost production of the selected cyanobacterial strains. The present study provides an insight into the distribution, abundance, diversity and ecology of cyanobacteria of Cochin estuary. From the results, it is evident that the ecological conditions of Cochin estuary support a rich cyanobacterial growth.
Bright Singh, I S; Preetha, R; Jayaprakash, N S(Inter-Research, March , 2007)
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Abstract:
Synechocystis MCCB 114 and 115 were segregated as putative probionts for shrimp
larvae from a collection of 54 cyanobacterial cultures enriched from seawater. On feeding Penaeus
monodon post-larvae with the cyanobacteria, the generic diversity of the intestinal bacterial flora
could be enhanced with substantial reduction or total absence of Vibrio spp. A significant difference
(p < 0.001) in the percent survival of batches of post-larvae fed on the cyanobacterial cultures was
observed and, on repeated challenge with V. harveyi, the relative percent survival of those batches
of larvae fed on Synechocystis MCCB 114 and 115 was significantly higher. The Synechocystis
MCCB 114 and 115 cultures were found to contain high levels of protein (34 to 43%), in addition to
carotenoids