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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo

Volume 66, Issue 8

sp. nov., an extremely halophilic archaeon isolated from a subterranean rock salt Free

Abstract

An extremely halophilic archaeon, strain PJ61, was isolated from a subterranean rock salt of Yuanyongjing Salt Mine, Yunnan, China. Colonies were pale, smooth, convex, and round (1.0–2.0 mm in diameter) on nutrient agar plates. Cells of strain PJ61 were spherical or oval , stained Gram-negative, and were non-motile. Optimal growth was observed with 3.4 M NaCl and at 38 °C in aerobic conditions. Mg was required for growth. Phylogenetic analysis based on 16S rRNA gene sequence similarities showed that strain PJ61 belonged to the genus and was closely related to R60 (98.3 % 16S rRNA gene sequence similarity), GX71 (98.2 %) and other species of the genus (<98 %). Sequence similarities of gene and - gene between strain PJ61 and the species of the genus also showed that strain PJ61 was closely related to strain GX71 (93.4 % for and 94.8 % for -). The DNA–DNA relatedness between strains PJ61 and R60 was 33±0.5 %, while it was 37±0.4 % for GX71. The DNA G+C content of strain PJ61 was 65.1 mol%. The major polar lipids of strain PJ61 consisted of phosphatidylglycerol, phosphatidylglycerol phosphate methyl ester, phosphatidylglycerol sulfate and sulfated mannosyl glucosyl diether. The phenotypic, chemotaxonomic and phylogenetic properties suggest that strain PJ61 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is PJ61 (=CGMCC 1.15212 =JCM 30955).

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Keyword(s): Haloarchaea , Halorubrum , Polyphasic taxonomy and Salt Mine
© 2016 IUMS
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2016-08-01
2024-04-25
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Halorubrum pallidum sp. nov., an extremely halophilic archaeon isolated from a subterranean rock salt
Int J Syst Evol Microbiol 66, 2980 (2016); https://doi.org/10.1099/ijsem.0.001129
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