1887

Abstract

An aerobic, motile, moderately thermophilic, rod-shaped bacterium, strain YBY-7, was isolated from a terrestrial hot spring of a garden exhibition located in Xiamen City, Fujian Province, People’s Republic of China. Cells of strain YBY-7 were Gram-negative, irregular rods, 2–6 µm long and 0.4–0.6 µm wide, with polar flagella, and the organism formed beige colonies. The temperature and pH ranges for growth of strain YBY-7 were 28–65 °C (optimum 50–58 °C) and pH 6.5–9.5 (optimum pH 7.5–8.5). Growth occurred in the presence of 5.5 % NaCl (optimum 3.0 %). Phylogenetic analysis based on the 16S rRNA gene sequence revealed that FRR-10 was its closest neighbour (95.9 % similarity). Ubiquinone (Q-10) was the sole respiratory quinone and the DNA G+C content of strain YBY-7 was 70.6 mol%. The predominant polar lipids were phosphatidylcholine, phosphatidylglycerol and phosphatidylethanolamine. The major fatty acids were Cω7 (29.3 %), C cyclo ω8 (25.6 %), C (23.6 %) and C (9.6 %). Based on its physiological characteristics and our phylogenetic analysis, we propose that strain YBY-7 represents a novel species of the genus , for which the name sp. nov. is proposed, with the type strain YBY-7 ( = MCCC 1A06317  = CGMCC 1.10789  = LMG 26247).

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2012-07-01
2019-10-24
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