Abatract
A Gram-negative, non-motive, aerobic and non-spore-forming strain 16-28-2T isolated from freshwater sediment of Taihu Lake was characterized by using a polyphasic approach. The optimum growth conditions were found to be as follows: 28 °C, pH 6.5 and 0–0.5 % NaCl in YG liquid medium. The major fatty acids were identified to be summed feature 3 (consisting of C16:1 ω7c and/or C16:1 ω6c), summed feature 8 (consisting of C18:1 ω7c and/or C18:1 ω6c), C14:0 2-OH, C17:1 ω6c, C16:0 and C18:1 ω7c 11-methyl (>5 %). Strain 16-28-2T was found to contain diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine and sphingoglycolipid as the major polar lipids; and ubiquinone 10 (Q-10) as the major respiratory quinone. DNA G+C content of strain 16-28-2T was 63.5 mol % (Tm). A phylogenetic study of 16S rRNA gene indicated that strain 16-28-2T is a member of the genus Novosphingobium, with the highest 16S rRNA gene sequence similarity of 96.3 % with Novosphingobium lentum MT1T and below 96 % with the other Novosphingobium species. On the basis of the phylogenetic, phenotypic analyses and biochemical characterization, we suggest that strain 16-28-2T is a novel species in the genus Novosphingobium, for which the name Novosphingobium tardum sp. nov. is proposed. The type strain of N. tardum is 16-28-2T (=CGMCC 1.12989T =NBRC 110956T).
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This work was supported by the project No.31070105 of the National Natural Science Foundation of China. It was also supported by China Geological Survey Grant (No. 12120113015200).
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Chen, N., Yu, XJ., Yang, JS. et al. Novosphingobium tardum sp. nov., isolated from sediment of a freshwater lake. Antonie van Leeuwenhoek 108, 51–57 (2015). https://doi.org/10.1007/s10482-015-0463-x
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DOI: https://doi.org/10.1007/s10482-015-0463-x