Isoptericola halalbus sp. nov., a halotolerant actinobacterium isolated from saline lake sediment

International Journal of Systematic and Evolutionary Microbiology
Hong MingGuo-Xing Nie

Abstract

A novel Gram-stain-positive bacterium, designated CFH 91151T, was isolated from sediment collected from a saline lake in Yuncheng, Shanxi Province, PR China. Cells of strain CFH 91151T were rod-or v-shaped, aerobic, non-motile, non-spore-forming and halotolerant. Results of 16S rRNA gene sequence analysis revealed that strain CFH 91151T was closely related to Isoptericola variabilis MX5T and Isoptericola nanjingensis H17T (98.7 and 98.4% sequence similarity, respectively). The strain grew at 4-45 °C, pH 5.0-9.0 and with 0-14.0 % (w/v) NaCl. Cells were positive for catalase, nitrate was not used and H2S was not produced. Major cellular fatty acids were anteiso-C15 : 0 (62.76 %), anteiso-C17 : 0 (12.09 %) and iso-C15 : 0 (9.46 %). The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol, two unidentified phospholipids and three unidentified glycolipids. The menaquinone was MK-9 (H4). The genome size was 4.10 Mbp with a G+C content of 72.4 mol%. The average amino acid identity (ANI) and in silico DNA-DNA hybridization (DDH) values between CFH 91151T and the other species of the genus Isoptericola were found to be low (ANIm <87.19 %, ANIb <84.38 % and DDH <29.30 %). Based on physiological prope...Continue Reading

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Citations

Jan 22, 2021·Current Microbiology·Dhanesh KumarCh Venkata Ramana

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