- International Journal of Systematic and Evolutionary Microbiology
- Volume 52, Issue 6
f Pseudomonas extremorientalis sp. nov., isolated from a drinking water reservoir.
- Authors: Elena P Ivanova, Nataliya M Gorshkova, Tomoo Sawabe, Karin Hayashi, Nataliya I Kalinovskaya, Anatolii M Lysenko, Natalie V Zhukova, Dan V Nicolau, Tatyana A Kuznetsova, Valery V Mikhailov, Richard Christen
- First Published Online: 01 November 2002, International Journal of Systematic and Evolutionary Microbiology 52: 2113-2120, doi: 10.1099/00207713-52-6-2113
- Subject: Articles
- Issue Published:
On the basis of phenotypic and genotypic characteristics and 16S rDNA sequence analysis, a novel species belonging to the genus Pseudomonas sensu stricto was identified. The saprophytic, fluorescent bacterium, designated KMM 3447(T), was isolated from a drinking water reservoir near Vladivostok City, Russia. The novel organism was a Gram-negative, aerobic, rod-shaped bacterium that produced a cyclic depsipeptide with surface-active properties. It degraded casein, but did not degrade gelatin, starch, agar or Tween 80. The bacterium was also haemolytic. Growth of the novel bacterium occurred between 4 and 35 degrees C. The predominant cellular fatty acids of the novel pseudomonad were C16:0, C16:1(n-7), C18:1(n-7) and C17.0 cyclo; branched fatty acids were only found in trace amounts. The G+C content of the novel bacterium was 61.0 mol%. 16S rDNA sequence analysis indicated that the novel bacterium had a clear affiliation with Pseudomonas fluorescens and species closely related to this recognized pseudomonad. DNA-DNA hybridization experiments showed that the novel bacterium bound at low levels (27-53%) with the DNA of the type strains of its nearest phylogenetic relatives, namely Pseudomonas tolaasii, Pseudomonas veronii, Pseudomonas orientalis and Pseudomonas rhodesiae, indicating that the novel bacterium represented a novel species within the genus Pseudomonas, for which the name Pseudomonas extremorientalis is proposed; the type strain is KMM 3447(T) (= LMG 19695(T)).
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