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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo

Volume 72, Issue 8

sp. nov., isolated from shallow-sea hydrothermal system off Kueishantao Island No Access

Abstract

A Gram-stain-negative, strictly aerobic, non-motile, ovoid or short-rod shaped, orange-pigmented bacterial strain, designated as strain JLT1, was isolated from seawater of the shallow-sea hydrothermal system, near Kueishantao Islet. Growth was observed at 5–45°C (optimum, 30 °C) and pH 5.0–11.0 (optimum, pH 7.0). The salinity range for growth was 0–12 % (optimum, 2–4 %) (w/v) NaCl. JLT1 contained ubiquinone-10 as the main respiratory quinone. Iso-C, summed feature 3 (Cω7/ω6) and summed feature 8 (Cω6/ω7) were identified as the major cellular fatty acids. Polar lipids included diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, three unidentified phospholipids, eight unidentified glycolipids and an unidentified lipid. The 16S rRNA gene of JLT1 shared the greatest similarity (96.31 %) with those of Ery9 and GM-16. The draft genome size of JLT1 is 3.56 Mb, with 3578 potential genes and a genomic DNA G+C content of 63.24 mol %. Average nucleotide identity and digital DNA–DNA hybridization values of JLT1 compared with Ery9, GM-16, S2-4-2, Ery22 and E4A9 were 74.5, 73.9, 74.4, 74.3 and 74.8 % and 20.6, 19.2, 20.0, 20.5 and 19.8%, respectively. On the basis of these phylogenetic, chemotaxonomic and phenotypic features, JLT1 is concluded to represent a novel species of the genus , for which the name sp. nov. is proposed. The type strain is JLT1 (=CGMCC 1.15786 =JCM 31508).

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Keyword(s): Croceicoccus hydrothermalis , Kueishantao Island and polyphasic taxonomic approach
© 2022 The Authors
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2022-08-08
2024-05-14
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Croceicoccus hydrothermalis sp. nov., isolated from shallow-sea hydrothermal system off Kueishantao Island
Int J Syst Evol Microbiol 72, 005472 (2022); https://doi.org/10.1099/ijsem.0.005472
/content/journal/ijsem/10.1099/ijsem.0.005472
/content/journal/ijsem/10.1099/ijsem.0.005472
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