Flavihumibacter profundi sp. nov., isolated from eutrophic freshwater sediment

Ting-Ting Ren; Chun-Zhi Jin; Feng-Jie Jin; Taihua Li; Chang-Jin Kim; Hee-Mock Oh; Hyung-Gwan Lee; Long Jin

doi:10.1007/s12275-018-7567-8

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Flavihumibacter profundi sp. nov., isolated from eutrophic freshwater sediment: Ting-Ting Ren ¹, Chun-Zhi Jin ^2,3, Feng-Jie Jin ¹, Taihua Li ¹, Chang-Jin Kim ^2,3, Hee-Mock Oh ⁴, Hyung-Gwan Lee ⁴, Long Jin ¹; Journal of Microbiology 2018;56(7):467-471.
DOI: https://doi.org/10.1007/s12275-018-7567-8
Published online: June 28, 2018

¹College of Biology and the Environment, Co-Innovation Centre for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, P. R. China, ²Industrial Biomaterial Research Centre, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea, ³Department of Bio-Molecular Science, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea, ⁴Cell Factory Research Centre, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea¹College of Biology and the Environment, Co-Innovation Centre for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, P. R. China, ²Industrial Biomaterial Research Centre, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea, ³Department of Bio-Molecular Science, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea, ⁴Cell Factory Research Centre, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon 34141, Republic of Korea

Corresponding author: Long Jin , Tel: +86-25-8542-7210,

Received: 28 December 2017 • Revised: 30 April 2018 • Accepted: 1 May 2018

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Abstract

A Gram-stain-positive, aerobic, non-motile, non-spore-forming, and rod-shaped bacterium, designated strain CHu64- 6-1T, was isolated from a 67-cm-long sediment core collected from the Daechung Reservoir at a water depth of 17-m in Daejeon, Republic of Korea. Comparative 16S rRNA gene sequence studies placed the new isolate in the class Sphingobacteriia, and the isolate is notably most closely related to Flavihumibacter sediminis CJ663T (98.1% similarity), Flavihumibacter solisilvae 3-3T (97.8%), Flavihumibacter petaseus T41T (97.5%), Flavihumibacter cheonanensis WS16T (97.4%), and Flavihumibacter stibioxidans YS-17T (97.2%). The cells of strain CHu64-6-1T formed yellow colonies on R2A agar and contained MK-7 as the only menaquinone, phosphatidylethanolamine, an unidentified phospholipid, and two unidentified aminolipids as the major polar lipids, and C15:0 iso, C17:0 iso 3-OH, C15:1 iso G, and C16:1 ω5c as the major fatty acids (> 5%). The DNA G + C content of the genome was determined to be 46.5 mol%. The DNA-DNA hybridization values of strain CHu64-6-1T with F. sediminis CJ663T, F. solisilvae 3-3T, F. petaseus T41T, F. cheonanensis WS16T, and F. stibioxidans YS-17T were 12.4–33.2%. Based on the combined genotypic and phenotypic data, we propose that strain CHu64-6-1T represents a novel species of the genus Flavihumibacter, for which the name Flavihumibacter profundi sp. nov. is proposed. The type strain is CHu64-6-1T (= KCTC 62290T = CCTCC AB 2018060T).

Keywords: Flavihumibacter;Flavihumibacter profundi;CHu64- 6-1;sediments

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Flavihumibacter profundi sp. nov., isolated from eutrophic freshwater sediment

J. Microbiol. 2018;56(7):467-471. Published online June 28, 2018

DOI: https://doi.org/10.1007/s12275-018-7567-8

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