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Fatty acid profiling of filamentous non-heterocystous cyanobacteria from Loktak Lake, the largest freshwater lake in North-Eastern region of India

Author Affiliations

  • 1Freshwater Cyanobacterial and Microalgal Repository, Microbial Resources Division, Institute of Bioresources and Sustainable Development,
  • 2A National Institute of DBT, Govt. of India, Takyelpat, Imphal-795001, Manipur, INDIA
  • 3Dept. of Life Science and Bio-informatics, Hargobind Khurana School of Life Sciences, Assam University, Silchar-788011, Assam, INDIA

Int. Res. J. Biological Sci., Volume 4, Issue (6), Pages 69-74, June,10 (2015)

Abstract

In the present study, twenty-one (21) strains of cyanobacteria isolated from freshwater habitats of Loktak Lake were characterized for total lipid and fatty acid composition. Total lipid content ranged between 0.20% to 7.00%. Maximum lipid content was observed in Phormidium tenue BTA-1073 followed by Phormidium corium BTA-64 and Phormidium tenue BTA-63 while Phormidium corium BTA-1065 showed the minimum.Profiling offatty acid composition showed that capric acid (10:0) and lauric acid (C12:0) were only the predominant component. Plectonema sp. BTA-65 and Phormidium tenue BTA-1076 showed high capric acid content as 21.03% and 17.26%. Caprylic acid (C8:0) was maximum in Phormidium fragile BTA-1020 (10.08%). Lauric acid (C12:0) content was maximum in Plectonema sp. BTA-65 (16.23%) and minimum in Phormidium corium BTA-1065 (2.37%). Of the polyunsaturated fatty acid, -linolenic acid (C18:3n3) and arachidic acid (C20:0) were present only in Lyngbya putealis BTA-1013. Linoleic acid (C18:2n6) was observed only in Phormidium tenue BTA-63 (0.48%) and Plectonema sp. BTA-65 (0.65%). One of the pharmaceutically potential componenet, Eicosapentaenoic acid (C20:5n3) was occurred in Phormidium tenue BTA-63 (0.44%) only. Palmitoleic acid (C16:1) and oleic acid (C18:1n9) were the most abundant MUFAs in all the strains ranging between 0.05% to 6.85% for palmitoleic acid and 0.24% to 8.71% for oleic acid except Phormidium tenue BTA-1076 and Lyngbya birgei BTA-1080. The levels of erucic acid (C22:1n9) was also present in low quantity in most strains except in few cases. The goal of the present study was to profile the fatty acid components of cyanobacteria isolated from Loktak Lake where potent strains could be used for the production of commercially important desired products.

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