Abstract：
:Bacterial cells are known to adapt to challenging environmental conditions such as osmotic stress. However, most of the work done in this field describes the adaptation of growing populations where the new generations acquire traits that improve their ability to survive. In the present study, the responses of Rhodococcus erythropolis cells within the first 30 min after exposure to osmotic stress caused by sodium chloride were studied. The cells changed the total lipid fatty acid composition and also the net surface charge in the 30 min following exposure. Surprisingly, the cells produced a high percentage of polyunsaturated fatty acids. In the presence of 7.5 % NaCl, these polyunsaturated fatty acids, mainly eicosapentaenoic acid (C20:5ω3), arachidonic acid (C20:4ω6) and docosapentaenoic acid (C22:5ω3), comprise more than 36 % of the total fatty acids. The possible function of these very uncommon fatty acids in bacteria could be the decrease in the number of negatively charged groups in ion channels resulting in a repellence of the NaCl.
journal_name
Appl Microbiol Biotechnoljournal_title
Applied microbiology and biotechnologyauthors
de Carvalho CC,Marques MP,Hachicho N,Heipieper HJdoi
10.1007/s00253-014-5549-2subject
Has Abstractpub_date
2014-06-01 00:00:00pages
5599-606issue
12eissn
0175-7598issn
1432-0614journal_volume
98pub_type
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