ISSN:
1433-4909
Keywords:
Key wordsDietzia natronolimnaios sp. nov.
;
Alkaliphile
;
Soda lake
;
16S rDNA
;
Phylogeny
;
Chemotaxonomy
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Two novel alkaliphilic aerobic organotrophic bacteria have been isolated from a moderately saline and alkaline East African soda lake. The new isolates grow at pH values between 6 and 10, with a pH optimum for growth of 9.0, and at a salt concentration between 0% and 10% (w/v). Phylogenetic analysis based on 16S rDNA sequence shows that these isolates are very closely related (99.6% similarity) and are members of the monospecific genus Dietzia (98.8% and 98.7% similarity). DNA/DNA hybridization revealed a relatedness of 83% between the two isolates, but only 8% between them and the type strain Dietzia maris. The G + C content as measured by thermal denaturation is 66.1 mol%. Phenotypic comparisons between D. maris and one isolate showed that they share very similar morphological and chemotaxonomic properties, but differ significantly in carbon source utilization profiles and halotolerance in alkaline medium. We propose a second species of this genus which we name Dietzia natronolimnaios (type strain 15LN1 = CBS 107.95).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s007920050079
Permalink
