1887

INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo

Volume 70, Issue 12

sp. nov., isolated from shallow-sea hydrothermal systems off Kueishantao Island Free

Abstract

A novel Gram-stain-negative, non-flagellated, non-motile, rod-shaped (0.4–0.6×1.8–2.5 µm), aerobic bacterial strain, designated JLT21, was isolated from seawater of a shallow-sea hydrothermal system. Growth occurred with 0–4.0 % (w/v) NaCl (optimum, 2.0 % NaCl), at 8–45 °C (optimum, 25 °C) and at pH 3.0–10.0 (optimum, pH 7.0). Analysis of 16S rRNA gene sequences revealed that strain JLT21 showed the highest 16S rRNA gene sequence similarity to KEM-8 (97.2 %), IMCC1914 (96.9 %) and GW1-1 (96.9 %). Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain JLT21 clustered with GW1-1. The predominant respiratory quinone of strain JLT21 was menaquinone-6 (MK-6). Polar lipids were phosphatidylcholine, phosphatidylglycerol, phosphatidylethanolamine, three unidentified glycolipids and four unidentified lipids. The major fatty acids of strain JLT21 were iso-C (21.7 %), C 6/7 (11.5 %) and iso-C 3-OH (10.9 %). The DNA G+C content of strain JLT21 was 32.6 %. On the basis of polyphasic analysis, strain JLT21 is considered to represent a novel species of the genus , for which the name sp. nov. is proposed. The type strain of is JLT21 (=CGMCC 1.15787=JCM 31511). The study helps us better understand the bacterial species in the shallow-sea hydrothermal system and their adaptations to the hydrothermal environment.

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Keyword(s): phylogenetic analysis , shallow-sea hydrothermal system , Yeosuana and Yeosuana marina
© 2020 The Authors
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2020-10-19
2024-04-26
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Yeosuana marina sp. nov., isolated from shallow-sea hydrothermal systems off Kueishantao Island
Int J Syst Evol Microbiol 70, 6251 (2020); https://doi.org/10.1099/ijsem.0.004525
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