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Abstract

A Gram-stain-negative, oval-shaped and light pink pigmented bacterium, designated XAAS-2, was isolated from rhizosphere soil of Tamarix ramosissima. The sole respiratory quinone of the type strain XAAS-2 was MK-7, and the principal cellular fatty acids were summed feature 4 (iso-C17 : 1 I and/or anteiso-C17 : 1 B) and iso-C15 : 0. The major polar lipids were phosphatidylethanolamine and two unidentified lipids. 16S rRNA gene sequence analysis indicated that strain XAAS-2 belonged to the genus Pontibacter within the family Cytophagaceae with sequence similarities of 93.9–97.1 % to other type species of the genus Pontibacter and to Pontibacter xinjiangensis CCTCC AB 207200 as the closest neighbour. The DNA G+C content of strain XAAS-2 was 50.6 mol%. The level of DNA–DNA relatedness of XAAS-2 and P. xinjiangensis CCTCC AB 207200 was 47.5 % (sd=3.27). Phenotypic and genotypic data suggested that strain XAAS-2 represents a novel species of the genus Pontibacter , for which the name Pontibacter brevis sp. nov. is proposed, with the type strain XAAS-2 (=CCTCC AB 2016135=JCM 31443).

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2017-12-05
2019-10-14
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