Martínez-Checa, Fernando;
Quesada, Emilia;
Martínez-Cánovas, M. José;
Llamas, Inmaculada;
Béjar, Victoria
Palleronia marisminoris gen. nov., sp. nov., a moderately halophilic, exopolysaccharide-producing bacterium belonging to the ‘Alphaproteobacteria’, isolated from a saline soil
You can manage bookmarks using lists, please log in to your user account for this.
Media type:
E-Article
Title:
Palleronia marisminoris gen. nov., sp. nov., a moderately halophilic, exopolysaccharide-producing bacterium belonging to the ‘Alphaproteobacteria’, isolated from a saline soil
Contributor:
Martínez-Checa, Fernando;
Quesada, Emilia;
Martínez-Cánovas, M. José;
Llamas, Inmaculada;
Béjar, Victoria
imprint:
Microbiology Society, 2005
Published in:International Journal of Systematic and Evolutionary Microbiology
Description:
<jats:p>Strain B33<jats:sup>T</jats:sup> is a moderately halophilic, exopolysaccharide-producing, Gram-negative, non-motile rod isolated from a hypersaline soil bordering a saline saltern on the Mediterranean seaboard in Murcia (Spain). The bacterium is chemoheterotrophic and strictly aerobic. It contains a pink pigment but does not synthesize bacteriochlorophyll <jats:italic>a</jats:italic>. It requires 0·66 M Na<jats:sup>+</jats:sup>, 0·1 M Mg<jats:sup>2+</jats:sup> and 0·1 M K<jats:sup>+</jats:sup> for optimum growth. It does not produce acid from carbohydrates. It cannot grow with carbohydrates, organic acids, sugars, alcohols or amino acids as sole sources of carbon and energy. Its major fatty-acids are 18 : 1<jats:italic>ω</jats:italic>7<jats:italic>c</jats:italic> (68·9 %) and 19 : 0 cyclo <jats:italic>ω</jats:italic>8<jats:italic>c</jats:italic> (12·8 %). The sole respiratory lipoquinone found in strain B33<jats:sup>T</jats:sup> is ubiquinone-10. The DNA G+C content is 64·2 mol%. 16S rRNA gene sequence comparisons show that the isolate is a member of the <jats:italic>Roseobacter</jats:italic> clade within the class ‘<jats:italic>Alphaproteobacteria</jats:italic>’. The similarity values with <jats:italic>Roseivivax halodurans</jats:italic> and <jats:italic>Roseivivax halotolerans</jats:italic> are 88·2 and 88·0 % respectively and 92·2 % with <jats:italic>Salipiger mucosus</jats:italic>. DNA–DNA hybridization values with these species are <30 %. In the light of the polyphasic evidence gathered in this study it is proposed that the isolate be classified as a novel genus and species with the name <jats:italic>Palleronia marisminoris</jats:italic> gen. nov., sp. nov. The proposed type strain is strain B33<jats:sup>T</jats:sup> (=CECT 7066<jats:sup>T</jats:sup>=LMG 22959<jats:sup>T</jats:sup>).</jats:p>