Fatty acid composition and total lipids in 13 species of freshwater cyanobacteria isolated from different aquatic habitats of Southern Karnataka were examined. The species grown in BG-11 medium with nitrate were harvested at exponential phase. The GC analysis showed variation in n-saturated, unsaturated and long chain branched fatty acids with respect to location and habitat. Of the 13 species investigated, two toxic bloom forming species such as Microcystis aeruginosa and Nostoc linckia were also involved. Among the fatty acids detected most of them belong to polyunsaturated fatty acids (more than 60%). The study also revealed that palmitic acid C16:0 was found in all the isolates followed by linoleic acid C18:2. In some, the long chain fatty acids (C20:1 and C24:0) were found in lower concentrations.
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Author Name: Kodandoor Sharathchandra and Madaiah Rajashekhar
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Keywords: Cyanobacteria, Lipids, Fatty acids, Gas chromatography
EISSN: 2229 – 6905