1887

Abstract

A Gram-stain-negative, non-motile, aerobic, non-spore-forming, spherical bacterium (strain MIMtkB18) was isolated from desert soil collected from part of a Mongolian Plateau, territory of Inner Mongolia, PR China. Cell growth could be observed at 20–45 °C (optimum at 40 °C), at a pH of 6–9 (optimum at pH 8.6) and in the presence of 0–1 % (w/v) NaCl (optimum 0 %). The genomic DNA G+C content was 69.6 mol%. 16S rRNA gene sequence analysis showed that strain MIMtkB18 was most closely related to PK2 (94.1 %), species of the genus (93.4–94.0 %), and E19 (93.9 %). The sole respiratory quinone was Q-10. The major fatty acids (>5 %) were C (5.7 %) and summed feature 8 (Cω7 and/or Cω6) (81.6 %). Polar lipids were mainly composed of phosphatidylethanolamine, phosphatidylglycerol, phosphatidylcholine, phosphatidylmonomethylethanolamine and unidentified phospholipids. Based on phenotypic, chemotaxonomic and phylogenetic characteristics, it is concluded that strain MIMtkB18 represents a novel genus and species, for which the name sp. nov. is proposed. The type strain is MIMtkB18 (=KCTC 42635=MCCC 1K00571).

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2017-08-01
2024-03-28
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