1887

Abstract

The Gram-positive, alkali- and salt-tolerant marine bacterium strain P203 is described together with its closest phylogenetic neighbour, terrestrial isolate LMG 21005. Strain P203 was isolated from material from the sponge that was obtained from the Sula-Ridge, Norwegian Sea. Strain LMG 21005 was an undescribed strain that was isolated from a church wall mural in Germany. Strains P203 and LMG 21005 were identified as novel alkalitolerant members of the rRNA group 6 with a 16S rRNA gene sequence similarity of 99.5 %. The closest described neighbour, DSM 8722, showed 99.0 % gene sequence similarity with P203 and 98.8 % similarity with strain LMG 21005. Despite the high 16S rRNA gene sequence similarity, DNA–DNA cross-hybridization revealed only 25.8–34.1 % similarity amongst the three strains. The DNA G+C contents were 41.1 mol% for strain P203 and 39.6 mol% for strain LMG 21005. Both strains grew well between pH 7 and pH 11. Strain P203 showed growth at moderate temperatures (from 4 to 30 °C) and in the presence of up to 12 % (w/v) NaCl at pH 9.7, whereas strain LMG 21005 was not salt tolerant (up to 4 % NaCl) and no growth was observed at 4 °C. The major fatty acids of strains P203, LMG 21005 and the type strain of were the saturated terminally methyl-branched compounds iso-C (19.8, 15.6 and 28.0 %, respectively) and anteiso-C (57.1, 48.6 and 45.2 %, respectively). Physiological and biochemical tests allowed genotypic and phenotypic differentiation of strains P203 and LMG 21005 from the six related species with validly published names and supported the proposal of two novel species, [type strain P203 (=DSM 19153=NCIMB 14288)] and [type strain LMG 21005 (=NCIMB 14102)].

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2007-12-01
2019-10-18
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Morphology of cells of strain P203 and strain LMG 21005 as observed by TEM. [ PDF] (57 KB)

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Comparison of total cellular fatty acids from strain P203 , strain LMG 21005 and DSM 8722 . [ PDF] (45 KB)

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