Randomized trial shows how growth conditions affect lipid composition in halophilic archaebacteria, suggesting complex interactions.
The polar lipids of members of the family Halobacteriaceae are derived from isopranyl glycerol diethers. In many strains only a single, diphytanyl glycerol diether is present. However, certain genera contain strains that produce, in addition to the diphytanyl glycerol diether, a sesterterpanyl-phytanyl glycerol diether. In order to test the hypothesis that the relative amounts of the diethers may alter with changes in the growth conditions, a number of selected strains were grown in media of different salinity. The observed changes in the diether lipid composition indicates that growth conditions affect their distribution, although these studies indicate a complex interaction between genetic, phenetic and physiological parameters in each of the strains.
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Morth et al. (1985) studied this question.
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