title: Different strategies of osmoadaptation in the closely related marine myxobacteriaEnhygromyxa salinaSWB007 andPlesiocystis pacificaSIR-1.
abstract: Only a few myxobacteria are known to date that are classified as marine, owing to their salt dependency. In this study, the salt tolerance mechanism of these bacteria was investigated. To this end, a growth medium was designed in which the mutatedEscherichia colistrain BKA13 served as sole food source for the predatory, heterotrophic myxobacteria. This enabled measurement of the osmolytes without any background and revealed that the closely related strainsEnhygromyxa salinaSWB007 andPlesiocystis pacificaSIR-1 developed different strategies to handle salt stress.Ple. pacificaSIR-1, which was grown between 1 and 4 % NaCl, relies solely on the accumulation of amino acids, whileEnh. salinaSWB007, which was grown between 0.5 and 3 % NaCl, employs, besides betaine, hydroxyectoine as the major compatible solute. In accordance with this analysis, only in the latter strain was a locus identified that codes for genes corresponding to the biosynthesis of betaine, ectoine and hydroxyectoine.
authors: Institute for Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115 Bonn, Germany.
authors: Jamshid Amiri
authors: JA
authors: Moghaddam
authors: Institute for Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115 Bonn, Germany.
authors: Nils
authors: N
authors: Boehringer
authors: Institute of Microbiology & Biotechnology, University of Bonn, Meckenheimer Allee 168, 53115 Bonn, Germany.
authors: Amal
authors: A
authors: Burdziak
authors: Bundesanstalt für Materialforschung und -prüfung (BAM), Unter den Eichen 87, 12205 Berlin, Germany.
authors: Hans-Jörg
authors: HJ
authors: Kunte
authors: Institute of Microbiology & Biotechnology, University of Bonn, Meckenheimer Allee 168, 53115 Bonn, Germany.
authors: Erwin A
authors: EA
authors: Galinski
authors: Institute for Pharmaceutical Biology, University of Bonn, Nussallee 6, 53115 Bonn, Germany.
authors: Till F
authors: TF
authors: Schäberle