Fatty acid composition of Desulfuromonas acetoxidans ІМВ-7384 cell under the influence of ferric citrate

Abstract

Desulfuromonas acetoxidans ІМV В-7384 bacteria are perspective in the development of biotechnologies for remediation of wastewater from transitional metal ions. Investigation of defense mechanisms of D. acetoxidans IMV B-7384 cells from stress conditions, in particular from increasing concentrations of heavy metals is important for understanding pathways of regulation mechanisms of bacterial metabolism in the process of remediation of wastewater by bacteria. Changes in fatty acid composition of lipids are considered as one of possible ways of protection of bacterial cells under stress conditions. Addition of ferric citrate to the growth medium of D. acetoxidans ІМВ В-7384 bacteria caused changes in fatty acids composition compared to the control. Under the addition of ferric citrate in different concentrations the decrease of content of saturated fatty acids with odd carbon number was observed. The increase of content of saturated fatty acids with even carbon number, fatty acids with cyclopropane ring and branched fatty acids was observed under the influence of different concentrations of metal salt. Index of unsaturation fatty acids decreased under these conditions. The rate of cis-trans conversation of unsaturated fatty acids of D. acetoxidans ІМВ В-7384 cells did not increase under the influence of the ferric citrate.

Keywords

• desulfuromonas acetoxidans імv в-7384
• ferric citrate
• fatty acids