Viability and membrane lipid composition under a 57 mT static magnetic field in Salmonella Hadartest

Highlights

•The viability of Salmonella Hadar increased significantly after 9 h of exposure SMF.
•SMF exposure induced changes in the fatty acid composition of total lipids in Salmonella Hadar.
•Cardiolipins were the main phospholipids involved in the adaptation of Salmonella Hadar to SMF.

Abstract

…the effects of a static magnetic field (SMF) with an induction 12 equal to 57 mT on the viability and membrane lipid composition of Salmonella Hadar. Results showed an increase in the viability of exposed bacteria compared to controls after 9 h of exposure. Analysis with gas chromatography of total lipids (TLs) and different fractions of phospholipids: phosphatidylglycerols (PGs), phosphatidylethanolamines (PEs), and cardiolipins (CLs), separated by thin layer chromatography revealed changes in fatty acid levels during exposure. For TLs, the unsaturated fatty acids/saturated fatty acids ratio (UFAs/SFAs) had significantly increased after 9 h of exposure. The variation of this ratio seems to be essentially due to the increase of the proportion of unsaturated fatty acids with 18 carbons, in particular C18:1… showed that CLs contributed significantly to the increase of the proportion of the unsaturated fatty acids between 6 and 9 h of exposure thanks to their unsaturated chains with 18 carbons (especially C18:2). …
Authors: Ramla Ben Mouhoub a, Alya El May a, Imen Boujezza a, Mohamed Marouen Sethom b, Moncef Feki b, Ahmed Landoulsi a
a Biochemistry and Molecular Biology, Code UR13ES34 Research Unit, Faculty of Sciences of Bizerte, Zarzouna 7021, Carthage University, Tunisia
b Université de Tunis El Manar, Faculté de Médecine de Tunis, CHU La Rabta, Laboratoire de Biochimie, LR99ES11, Jebbari, 1007 Tunis, Tunisia
Bioelectrochemistry
Volume 122, August 2018, Pages 134–141

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