Hymenobacter paludis sp. nov., isolated from a marsh

Wen-Ming Chen, Zih-Han Chen, Chiu-Chung Young, Shih-Yi Sheu
International Journal of Systematic and Evolutionary Microbiology 2016, 66 (3): 1546-1553
A bacterial strain, designated KBP-30(T), was isolated from a water sample taken from the Banping Lake Wetland Park in Taiwan and characterized taxonomically using a polyphasic approach. Cells of strain KBP-30(T) were Gram-stain-negative, aerobic, motile by gliding rods that were covered by large capsules and formed red colonies. Growth occurred at 10-37 °C (optimum 20 °C), at pH 6-8 (optimum pH 6) and with 0-1 % NaCl (optimum 0 %). Phylogenetic analyses based on 16S rRNA gene sequences showed that strain KBP-30(T) belonged to the genus Hymenobacter and was most closely related to Hymenobacter ocellatus Myx 2105(T) with a sequence similarity of 97.7 %; 16S rRNA gene sequence similarities were less than 95.1 % with other members of the genus. Strain KBP-30(T) contained iso-C15 : 0, summed feature 4 (iso-C17 : 1 I and/or anteiso-C17 : 1 B), anteiso-C15 : 0, iso-C17 : 0 3-OH and summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c) as the predominant fatty acids. The major isoprenoid quinone was MK-7. The polar lipid profile consisted of phosphatidylethanolamine, three unidentified aminophospholipids, an unidentified aminolipid, an unidentified glycolipid and eight unidentified lipids. The major polyamine was homospermidine. The DNA G+C content of the genomic DNA was 60.3 mol%. The DNA-DNA relatedness of strain KBP-30(T) with respect to Hymenobacter ocellatus Myx 2105(T) was less than 42 %. On the basis of the phylogenetic inference and phenotypic data, strain KBP-30(T) represents a novel species of the genus Hymenobacter, for which the name Hymenobacter paludis sp. nov. is proposed. The type strain is KBP-30(T) ( = LMG 27293(T) = KCTC 32237(T)).

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