Ramlibacter rhizophilus sp. nov., isolated from rhizosphere soil of national flower Mugunghwa from South Korea
2017
A Gram-negative, aerobic, non-motile, long rods or coccoid without flagellum strain, designated THG-YS3.2.7T, was isolated from therhizosphere soil of a Mugunghwa flower collected from Kyung Hee University, Yongin, South Korea. Growth occurred at 10–40 °C (optimum 28–37 °C), at pH 6–8 (optimum 7) and at 0–5 % NaCl (optimum 1 %). The predominant ubiquinone was ubiquinone 8 (Q-8). The major cellular fatty acids were C10 : 0, C10 : 0 3OH, C16 : 0, C17 : 0, C17 : 0 cyclo, C18 : 0, C18 : 3
ω6c (6,9,12), summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c) and summed feature 8 (C18 : 1
ω7c and/or C18 : 1
ω6c). The major polar lipids were diphosphatidylglycerol (DPG), phosphatidylglycerol (PG), phosphatidylethanolamine (PE), phosphatidylcholine (PC). The DNA G+C content of strain THG-YS3.2.7T was 69.4 mol%. Based on 16S rRNA gene sequence analysis, the nearest phylogenetic neighbours of strain THG-YS3.2.7T were identified as
Ramlibacter henchirensis
DSM 14656T (97.92 %),
Ramlibacter tataouinensis
DSM 14655T (97.90 %),
Ramlibacter solisilvae
KACC 17567T (97.04 %). DNA–DNA hybridization values between strain THG-YS3.2.7T and R. henchirensis DSM 14656T,
R. tataouinensis
DSM 14655T,
R. solisilvae
KACC 17567T were 32.5±1.5, 43.1±1.1, 42.8±1.1 %, respectively. On the basis of the phylogenetic analysis, chemotaxonomic data, physiological characteristics and DNA–DNA hybridization data, strain THG-YS3.2.7T represent a novel species of the genus
Ramlibacter
, for which the name
Ramlibacter
rhizophilus sp. nov. is proposed. The type strain is THG-YS3.2.7T (=KCTC 52083T=CCTCC AB 2015357T).
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