1887

Abstract

A Gram-negative, aerobic, mesophilic, non-spore-forming, chemotrophic, chlorophyll-lacking, nitrogen-fixing bacterium, designated strain USBA 355, was isolated from the saline spring ‘Salado de Consotá’ situated in the Colombian Andes. The non-flagellated cells of strain USBA 355 were straight to slightly curved rods (0.6–0.7 × 3.0–3.5 μm). Growth occurred optimally at 30 °C (growth temperature range between 20 and 40 °C), at pH 6.5–6.7 (pH growth range between 5.0 and 8.0) and at 0.5 % NaCl (w/v) (range between 0 and 4 %). The major quinone present was Q-10 and the predominant fatty acids identified were C cyclo 8, C 7 and C. The G+C content of the chromosomal DNA was 71±1 mol%. 16S rRNA gene sequence analysis indicated that strain USBA 355 formed a distant phylogenetic line of descent with members of the genus , family , class (90 % gene sequence similarity). Comparison of the phylogenetic, chemotaxonomic and physiological features of strain USBA 355 with all other members of the family suggested that it represents a novel genus and species for which the name gen. nov., sp. nov. is proposed. The type strain of the type species is USBA 355 (=JCM 15529=KCTC 22406).

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2010-06-01
2020-09-23
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