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  • Title: Tabrizicola alkalilacus sp. nov., isolated from alkaline Lake Dajiaco on the Tibetan Plateau.
    Author: Phurbu D, Wang H, Tang Q, Lu H, Zhu H, Jiang S, Xing P, Wu QL.
    Journal: Int J Syst Evol Microbiol; 2019 Nov; 69(11):3420-3425. PubMed ID: 31385782.
    Abstract:
    A novel Gram-stain-negative, aerobic, non-motile and rod-shaped bacterium was isolated from Lake Dajiaco on the Tibetan Plateau. Strain DJCT grew without NaCl and tolerated up to 3 % (w/v) NaCl. Growth occurred at pH 6.0-10.0 (optimum, pH 7.0-8.0) and 15-37 °C (optimum, 25-30 °C). Vitamins were not required for growth. The main polar lipids of strain DJCT were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. The predominant respiratory quinone was Q-10. The major fatty acid was C18 : 1ω7c. Genome sequencing revealed a genome size of 4.61 Mbp and a G+C content of 62.9 mol%. Analysis of 16S rRNA sequences showed that strain DJCT belonged to the genus Tabrizicola, with the closest neighbour Tabrizicola aquatica RCRI19T (97.5 %). DNA-DNA relatedness between strain DJCT and the closest phylogenetically related strain T. aquatica RCRI19T was 40.8 %. Stain DJCT was clearly distinguished from the type strain mentioned above through phylogenetic analysis, DNA-DNA hybridization, fatty acid composition data and a range of physiological and biochemical characteristic comparisons. Based on its phenotypic and chemotaxonomic characteristics, strain DJCT could be classified as a representative of a novel species of the genus for which the name Tabrizicola alkalilacus sp. nov. is proposed. The type strain is DJCT (=CICC 24242T=KCTC 62173T).
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