Abstract
Strain DCY91T, a Gram-stain-negative, rod-shaped, aerobic, non-motile bacterium, was isolated from soil of ginseng field in Gyeonggi province, South Korea. Strain DCY91T shared the highest 16S rRNA gene sequence similarity with Sphingomonas mucosissima DSM 17494T (98.55 %), Sphingomonas dokdonensis KACC 17420T (98.11 %) and Sphingomonas xinjiangensis DSM 26736T (96.68 %). The strain DCY91T was found to able to grow best in trypticase soy agar at 28 °C, at pH 7 and at 0.5 % NaCl. Ubiquinone 10 was identified as the isoprenoid quinone. The major polar lipids were identified as sphingoglycolipid, diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol and phosphatidylcholine. The major fatty acids of strain DCY91T were identified as unsaturated C18:1 ω7c and saturated C16:0. The major polyamine content was sym-homospermidine. The DNA G + C content was determined to be 65.8 mol% (HPLC). After 6 days of incubation, strain DCY91T produced 9.64 ± 1.73 and 33.73 ± 4.66 µg/ml indole-3-acetic acid, using media without l-tryptophan and supplemented with l-tryptophan, respectively. Strain DCY91T was also weakly solubilized phosphate and produced siderophores. On the basis of the phenotypic characteristics, genotypic analysis and chemotaxonomic characteristics, strain DCY91T is considered to represent a novel species of the genus Sphingomonas, for which the name Sphingomonas panaciterrae sp. nov. is proposed. The type strain is DCY91T (=KCTC 42346T =JCM 30807T).
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Acknowledgments
This research was supported by Institute of Planning and Evaluation for Technology (IPET #313038-03-1-S13020) in Food, Agriculture, Forestry and Fisheries, Republic of Korea, and also supported by a grant from the Next-Generation BioGreen 21 Program, Systems and Synthetic Agrobiotech Center (SSAC # PJ01116602), Rural Development Administration, Republic of Korea.
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Communicated by Erko Stackebrandt.
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203_2015_1134_MOESM1_ESM.tif
Supplementary material 1 The maximum-parsimony tree based on 16S rRNA gene sequence analysis showing phylogenetic relationships of strain DCY91T and members of the genus Sphingomonas (TIFF 10997 kb)
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Supplementary material 2 Two-dimensional TLC of the total polar lipids of Sphingomonas panaciterrae DCY91T (a) and S. mucosissima DSM 17494T (b), stained for total polar lipids with 5 % ethanolic molybdophosphoric acid. Abbreviations: SGL, sphingoglycolipid; DPG, diphosphatidylglycerol; PE, phosphatidylethanolamine; PG, phosphatidylglycerol; PC, phosphatidylcholine; L, unidentified lipid (TIFF 15383 kb)
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Sukweenadhi, J., Kim, YJ., Kang, C.H. et al. Sphingomonas panaciterrae sp. nov., a plant growth-promoting bacterium isolated from soil of a ginseng field. Arch Microbiol 197, 973–981 (2015). https://doi.org/10.1007/s00203-015-1134-z
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DOI: https://doi.org/10.1007/s00203-015-1134-z