Lipid composition of some yeast strains from Livingston Island, Antarctica

Abstract

Yeast strains Cryptococcus albidus, Cryptococcus laurentii, Rhodotorula minuta were isolated from a moss sample. Candida oleophila and Rhodotorula mucilaginosa were isolated from a soil sample taken from Livingston Island. Antarctica. Fatty acid, phospholipid, sterol and tocopherol composition was determined in separated lipid fraction after fermentation in a medium containing glucose, peptone and yeast extract. Unsaturated fatty acids, mainly oleic (51-65%) and linoleic (9.5-16.8%), predominated in triacylglycerols. Sterols represent ca. 120-930 mg per kg dry biomass. The content of major phospholipids (phosphatidylcholine, phosphatidylinositol and phosphatidylethanolamine) was ca. 100-800 mg/kg. The amount of tocopherols (mainly gamma- and delta-tocopherol) was 2.1-6.3 mg/kg.

Characterization of a novel South American population of the astaxanthin producing yeast Xanthophyllomyces dendrorhous (Phaffia rhodozyma)

“…This proportion is unusual in yeasts, as they normally contain 20-30% PUFAs [18,22,35], and is much higher than that reported for X. dendrorhous commercial strains [22]. Higher amounts of PUFAs have been found for Antarctic yeasts, though they rarely exceed 50% of total FA [28,29].…”

Improving microbial oil production with standard and native oleaginous yeasts by using Taguchi design

“…Biodiesels are fatty acid methyl and ethyl esters derived from renewable lipid sources, and these fuels are good alternatives for fossil fuel because of being renewable, biodegradable and nontoxic (Zlatanov et al 2001;Meng et al 2009;Karatay and Donmez 2010;Liu et al 2010;Kosa and Ragauskas 2011;Chatzifragkou et al 2011). The high cost of biodiesel is the major obstacle for its commercialization.…”

Effect of Different Carbon Sources on Biosynthesis of Exopolysaccharide from Antarctic StrainCryptococcus LaurentiiAL62

“…the Antarctic microorganisms have recently attracted considerable attention for their metabolite adaptation at extreme Antarctic conditions and for practical reasons with the possibility for study of their biological potential for obtaining biologically active substances with useful properties (3,6,11,15,18,19,21,31). the genus Cryptococcus is the most predominant yeast group in the Antarctic.…”

“…From Antarctic yeasts from the Cryptococcus genus were selected producers for synthesis of enzymes, polysaccharides, carotenoids, lipids, bioremediation agents (7,10,13,15,16,17,29,31). the aim of this paper was to study the biosyntesis of the Antarctic isolate Al 62 exopolysaccharide in different carbon sources and to study the time course of the process with sucrose.…”