Abstract
A Gram-stain negative, rod-shaped and non-endospore forming bacterium, designated strain YG4-6T, was isolated from Polytrichastrum formosum collected from Gawalong glacier in Tibet, China and characterized by using a polyphasic taxonomic approach. The predominant fatty acids of strain YG4-6T were identified as iso-C15:0 (29.3 %), summed feature 3 (C16:1 ω7c and/or C16:1 ω6c as defined by MIDI, 23.5 %) and iso-C17:0 3-OH (16.5 %). The major polar lipids were found to consist of five unidentified aminolipids and three unidentified lipids. Strain YG4-6T was found to contain MK-6 as the dominant menaquinone and the G+C content of its genomic DNA was determined to be 37.3 mol%. The phylogenetic analysis based on 16S rRNA gene sequences showed that strain YG4-6T is affiliated to Chryseobacterium species, and its closest related species were Chryseobacterium aahli T68T (97.9 % sequence similarity), Chryseobacterium zeae JM-1085T (97.8 % sequence similarity), Chryseobacterium yeoncheonense DCY67T (97.6 % sequence similarity) and Chryseobacterium soldanellicola NBRC 100864T (97.2 % sequence similarity). However, the DNA–DNA relatedness values between these strains and strain YG4-6T were found to be clearly below 70 %. Based on the phylogenetic inference and phenotypic data, strain YG4-6T is considered to represent a novel species of the genus Chryseobacterium, for which the name Chryseobacterium polytrichastri sp. nov. is proposed. The type strain is YG4-6T (=CGMCC 1.12491T = DSM 26899T). An emended description of the genus Chryseobacterium is also proposed.
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Acknowledgment
This work was funded by the Scientific Research Program of National Natural Science Foundation of China (No. 31100004 and No. 31470136).
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The phylogenetic trees made by neighbour-joining and maximum parsimony methods, transmission electron micrographs and the TLC of the total polar lipids of strain YG4-6T are available as supplementary figures with the online version of this paper. (DOCX 1697 kb)
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Chen, X.Y., Zhao, R., Chen, Z.L. et al. Chryseobacterium polytrichastri sp. nov., isolated from a moss (Polytrichastrum formosum), and emended description of the genus Chryseobacterium . Antonie van Leeuwenhoek 107, 403–410 (2015). https://doi.org/10.1007/s10482-014-0338-6
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DOI: https://doi.org/10.1007/s10482-014-0338-6