![]() ![]() E.: The effect of growth temperature on the fatty acid composition of some psychrophilic marine Pseudomonads. H.: Fatty acid composition of Candida utilis as affected by growth temperature and dissolved oxygen tension. E.: Observations on the physiology of psychrophilism in a yeast. 40, 558–564 (1963)īaker, K.: Low cost continuous culture apparatus. G.: Structural correlation of unsaturated fatty acid esters through graphical comparison of gas liquid chromatographic retention times on a polyester substrate. The observed changes in fatty acid and phospholipid composition in these organisms at 0☌ may explain how solute transport is maintained at low temperature.Īckman, R. Additionally in Vibrio BM-2 and Vibro BM-4 phosphatidylserine accumulates as phosphatidylethanolamine biosynthesis was similarly impaired. At 15☌ phosphatidylglycerol accumulated in the isolates as diphosphatidylglycerol levels decreased. The most profound effect of temperature on the phospholipid composition of these organisms was the marked increase in the total quantities synthesized at 0☌. Lyso-phosphatidylethanolamine and 2 unknown phospholipids were additionally found in Vibrio AF-1. The principal phospholipid components of the four psychrophilic vibrios were phosphatidylserine, phosphatidylglycerol, phosphatidylethanolamine and diphosphatidylglycerol. The fourth isolate ( Vibrio BM-4) contains high levels (60%) of hexadecenoic acid at all growth temperatures and the fatty acid composition changes little with decreasing temperature. Vibrio AF-1 and Vibrio AM-1 respond to decreased growth temperatures by synthesizing increased proportions of unsaturated fatty acids (C15:1, C16:1 and C17:1) whereas in Vibrio BM-2 the fatty acids undergo chain length shortening. None of the isolates contain fatty acids with a chain length exceeding 17 carbon atoms. ![]() All the isolates show maximum glucose and lactose uptake at 0☌ and this correlates with maximum cell yield. have been determined in chemostat culture with glucose as the limiting substrate over a temperature range 0–20☌. The free fatty acid and phospholipid composition of 4 psychrophilic marine Vibrio spp. ![]()
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