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INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo

Volume 68, Issue 4

sp. nov., a halotolerant bacterium isolated from a saline lake Free

Abstract

A Gram-stain-negative, aerobic, non-motile and ovoid- to rod-shaped bacterial strain, designated TFZ, was isolated from a water sample of a saline lake in Xinjiang, China and subjected to polyphasic taxonomic investigation. Strain TFZ grew at 4–42 °C and pH 6.5–10.0 (optimum, 30 °C and pH 7.0) and with 0.5–18.0 % (w/v) NaCl (optimum, 1.5 %). According to phylogenetic analysis based on 16S rRNA gene sequences, strain TFZ was assigned to the genus with highest 16S rRNA gene sequence similarity of 97.5 % to EL-172, followed by SSW084 (96.6 %) and DSM 17069 (95.5 %). Digital DNA–DNA hybridization (DDH) and average nucleotide identity (ANI) were determined to evaluate the genomic relationship between strain TFZ and EL-172. Digital DDH estimation (22.80±2.35 %) as well as ANI (80.1 %) proved the dissimilarity of strain TFZ. Chemotaxonomic analysis showed that strain TFZ contained ubiquinone-10 as the predominant respiratory quinone and possessed summed feature 8 (comprising C 7 and/or 6) and C as the predominant form of fatty acid. The polar lipids of strain TFZ consisted of phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine and five unidentified lipids. The DNA G+C content was 65.4 mol% (by genome sequencing). Based on the polyphasic taxonomic characterization, strain TFZ is considered to represent a novel species of the genus , for which the name sp. nov. is proposed (type strain TFZ=MCCC 1K03339=KCTC 52967).

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  • Accepted:
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Keyword(s): Roseovarius nitratireducens , saline lake and taxonomy
© 2018 IUMS
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2018-04-01
2024-04-25
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Roseovarius nitratireducens sp. nov., a halotolerant bacterium isolated from a saline lake
Int J Syst Evol Microbiol 68, 1204 (2018); https://doi.org/10.1099/ijsem.0.002651
/content/journal/ijsem/10.1099/ijsem.0.002651
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