Abstract
A yellowish colored, Gram-staining negative, strictly aerobic, motile, rod-shaped bacterium, designated THG-SQE7T, was isolated from reed pond water in Shangqiu, PR China. Comparative 16S rRNA gene sequence analysis indicated that strain THG-SQE7T is most closely related to Hydrogenophaga pseudoflava ATCC 33668T (98.4 %), followed by Hydrogenophaga bisanensis K102T (97.6 %) and Hydrogenophaga flava CCUG 1658T (97.6 %). DNA–DNA hybridization showed 53.5, 36.0 and 22.5 % DNA re-association with H. pseudoflava KCTC 2348T, H. bisanensis KCTC 12980T and H. flava KCTC 1648T, respectively. Chemotaxonomic data revealed that strain THG-SQE7T possesses ubiquinone-8 as the only isoprenoid quinone, summed feature 3 (C16:1 ω7c and/or C16:1 ω6c), C16:0 and C18:1 ω7c as the major fatty acids. The major polar lipids were found to be phosphatidylethanolamine, phosphatidylglycerol and diphosphatidylglycerol. The DNA G+C content was determined to be 63.7 mol%. These data corroborated the affiliation of strain THG-SQE7T to the genus Hydrogenophaga. Thus, the isolate represents a novel species, for which the name Hydrogenophaga luteola sp. nov. is proposed, with THG-SQE7T as the type strain (=KCTC 42501T = CCTCC AB 2014314T = JCM 30433T).
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Acknowledgments
This work was conducted under the industrial infrastructure program (No. N0000888) for fundamental technologies which is funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea).
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The NCBI GenBank accession number for the 16S rRNA gene sequence of strains THG-SQE7T is KM598239.
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Supplementary material 1 (PDF 13 kb) Supplementary Fig. S1. Maximum likelihood tree based on 16S rRNA gene sequence analysis showing phylogenetic relationships between strain THG–SQE7T and related members of the genus Hydrogenophaga. Numbers at nodes represent percentages of bootstrap support based on a maximum–likelihood analysis of 1,000 resampled datasets. Symbol * indicated the non-valid species of genus Hydrogenophaga
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Supplementary material 2 (PDF 188 kb) Supplementary Fig. S2. Transmission electron micrograph of cells of strain THG–SQE7T. The detection was performed after negative staining with uranyl acetate. Bar, 0.5µm
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Supplementary material 3 (PDF 272 kb) Supplementary Fig. S3. Two-dimensional TLC of the polar lipids of THG–SQE7T (a) and H. pseudoflava KCTC 2348T (b). a1 and b1: total lipids revealed by spraying with 5% molybdatophosphoric acid for strain THG–SQE7T and H. pseudoflava KCTC 2348T, respectively; a2 and b2: aminolipid revealed by spraying with 0.2% ninhydrin of stain THG–SQE7T and H. pseudoflava KCTC 2348T, respectively; a3 and b3: phospholipid revealed by molybdenum blue of stain THG–SQE7T and H. pseudoflava KCTC 2348T, respectively. No glycolipid appeared. Abbreviations: phosphatidylethanolamine (PE), diphosphatidylglycerol (DPE), phosphatidylglycerol (PG), unidentified phospholipid (PL) and unidentified lipids (L0-L5)
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Du, J., Yang, JE., Singh, H. et al. Hydrogenophaga luteola sp. nov. isolated from reed pond water. Antonie van Leeuwenhoek 108, 695–701 (2015). https://doi.org/10.1007/s10482-015-0525-0
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DOI: https://doi.org/10.1007/s10482-015-0525-0