Abstract:
:A novel Gram-stain-negative, motile and rod-shaped bacterium, designated xg18T, was isolated from Lake XuguoCo on the Tibetan Plateau. The strain was able to grow optimally at 0-2 % NaCl and tolerate up to 6 % NaCl. Growth occurred at pH 7.0-11.0 (optimum, pH 9.0-10.0) and 15-40 °C (optimum, 37 °C). Vitamins were not required for growth. The major polar lipids of strain xg18T were phosphatidyl ethanolamine and phosphatidylglycerol. The predominant respiratory quinone was Q-8. The major fatty acids were summed feature 8 (C18 : 1ω6c and/or C18 : 1ω7c), summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c) and C16 : 0. The G+C content of genomic DNA was 46.1 mol%. Analysis of 16S rRNA sequences showed that strain xg18T belongs to the genus Nitrincola, with Nitrincola alkalisediminis MEB087T (KC822363, 98.6 %) as its closest neighbour. The DNA-DNA relatedness value of strain xg18T with its closest phylogenetic neighbour, N. alkalisediminis JCM 19317T, was 43.1±3.2 %. Strain xg18T was clearly distinguishable from the type strain of the genus Nitrincola through phylogenetic analysis, fatty acid composition data and a range of physiological and biochemical characteristics comparisons. Based on its phenotypic and chemotaxonomic characteristics, strain xg18T could be classified as a representative of a novel species of the genus for which the name Nitrincola tibetensis sp. nov. is proposed. The type strain is xg18T (=CICC 24457T=KCTC 62401T).
journal_name
Int J Syst Evol Microbiolauthors
Phurbu D,Pema Y,Ma C,Lu H,Li H,Tian Y,Xing Pdoi
10.1099/ijsem.0.003111subject
Has Abstractpub_date
2019-01-01 00:00:00pages
123-128issue
1eissn
1466-5026issn
1466-5034journal_volume
69pub_type
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