THE EFFECT OF MICROELEMENTS ON LIPID METABOLISM IN CHLORELLA VULGARIS Beijer.

Abstract

The aim of the study was to determine the intensity of lipid biosynthesis in unicellular alga Chlorella vulgaris under the action of zinc and chromium (III) ions in the presence of sodium selenite. The results. The content of TAG under the action of selenite and selenite with zinc varied insignificantly in comparison with the control. After adding selenite and chromium the amount of TAG in the alga cells increased by 76%. The amount of DAG under the action of selenite separately and with chromium ions significantly decreased (by 18% and 15%, respectively), and selenite with zinc ions increased their content by 31%. The content of PL also changed: under the action of selenite only and with zinc ions their content respectively increased by 20% and 10% relative to the control, and when combined with selenite and chromium (III) - decreased by 15%. According to the revealed regularities, the content of non-etherified FA varied in the following way: after adding selenite with zinc and chromium (III) ions, their content increased by 48% and 20%, respectively, in comparison with the control. The predominance of relative content of unsaturated over saturated fatty acids was found both in the result of selenite activity separately and in combination with Zn 2+ and Cr 3+ . It was also found that the content of Se (IV) in lipids in the alga cells increased 2.1 times, Zn 2 + – 10.0 times, and Cr 3 + – 15.2 times. Conclusion . Therefore it can be concluded that individual reactions of chlorella cells to the influence of various combinations of salts are an example of adaptation both at the level of general metabolism and at the level of lipid metabolism.