1887

Abstract

A novel mineral-weathering bacterium was isolated from weathered rock (potassic trachyte) surfaces collected from Nanjing (Jiangsu, PR China). Cells of strain JN246 were Gram-stain-negative, rod-shaped and non-motile. Strain JN246 was aerobic, catalase- and oxidase-positive, and grew optimally at 28 °C and pH 7.0. On the basis of 16S rRNA gene sequence analysis, strain JN246 belonged to the genus and the closest phylogenetic relatives were YC6729 (98.5 % 16S rRNA gene sequence similarity), KP01 (96.8 %), and JN53 (96.3 %). The major respiratory quinone was MK-7 and the major polyamine was homospermidine. The major fatty acids were iso-C, Cω5, C and iso-C 3-OH. The polar lipid profile of strain JN246 consisted of phosphatidylethanolamine, unknown aminolipids and unknown lipids. The genomic DNA G+C content of strain JN246 was 48.8 mol%. Based on the low level of DNA–DNA relatedness of strain JN246 (ranging from 22.6 % to 42.4 %) to the type strains of other species of the genus and unique phenotypic characteristics, strain JN246 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is JN246 ( = CCTCC AB 2014201 = JCM 30026).

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2015-01-01
2019-11-22
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