Undibacterium jejuense sp. nov. and Undibacterium seohonense sp. nov., isolated from soil and freshwater, respectively

Abstract

Two bacterial strains, designated JS4-4T and SHS5-24T, were isolated from forest soil of Jeju Island and fresh water of Seoho lake in Suwon city, respectively, South Korea. Both strains were Gram-stain-negative, aerobic, motile rods. Strains JS4-4T and SHS5-24T showed high sequence similarities (97.6–95.8 %) and (96.5–95.6 %), respectively, to the members of the genus Undibacterium . The sequence similarity between strains JS4-4T and SHS5-24T was 97.0 %. A phylogenetic tree showed that these strains fell within the radius of the genus Undibacterium . The main fatty acids of strains JS4-4T and SHS5-24T were summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c) (50.1 and 58.7 %, respectively) and C16 : 0 (28.3 and 24.5 %, respectively). Both strains had ubiquinone 8 as the only respiratory quinone, and phosphatidylethanolamine, phosphatidylglycerol and diphosphatidylglycerol as the major polar lipids. Strain JS4-4T showed <70 % DNA–DNA hybridization with members of the genus Undibacterium . Thus, based on the evidence of a polyphasic study, it is proposed that strains JS4-4T and SHS5-24T represent two novel species, for which the names Undibacterium jejuense sp. nov. (type strain JS4-4T = KACC 12607T = NBRC 108922T) and Undibacterium seohonense sp. nov. (type strain SHS5-24T = KACC 16656T = NBRC 108929T) are proposed.

Undibacterium arcticum sp. nov., isolated from arctic alpine soil

“…S2). The novel isolate contained phosphatidylethanolamine, phosphatidylglycerol and diphosphatidylglycerol as the predominant polar lipids, which is consistent with previous descriptions of species of the genus Undibacterium (K€ ampfer et al, 2007;Eder et al, 2011;Liu et al, 2013;Kim et al, 2014;Du et al, 2015). The polyamine pattern of strain 6-67…”

“…At the time of writing, this genus comprised nine species with validly published names: Undibacterium pigrum (type species; K€ ampfer et al, 2007), U. parvum (K€ ampfer et al, 2007;Eder et al, 2011), U. oligocarboniphilum (Eder et al, 2011), U. terreum (Liu et al, 2013), U. jejuense and U. seohonense (Kim et al, 2014), U. macrobrachii , U. squillarum and U. aquatile (Du et al, 2015). Cells are characteristically Gram-stain-negative, oxidase-positive, rod-shaped, motile by a single polar flagellum and chemoheterotrophic.…”

Undibacterium macrobrachii sp. nov., isolated from a freshwater shrimp culture pond

“…T had Q-8 as the major respiratory quinone, which is the same as that of all other species of the genus Undibacterium (Kämpfer et al, 2007;Eder et al, 2011;Liu et al, 2013;Kim et al, 2014).…”

“…At the time of writing, the genus Undibacterium comprised six species with validly published names: Undibacterium pigrum (type species; Kämpfer et al, 2007), U. parvum (Kämpfer et al, 2007;Eder et al, 2011), U. oligocarboniphilum (Eder et al, 2011), U. terreum (Liu et al, 2013), U. jejuense and U. seohonense (Kim et al, 2014). Cells are characteristically Gram-staining-negative, oxidase-positive, rod-shaped, motile by a single polar flagellum and chemoheterotrophic.…”

The pathogenBatrachochytrium dendrobatidisdisturbs the frog skin microbiome during a natural epidemic and experimental infection

“…Whereas a number of studies have examined metabolic properties of cultured isolates belonging to this genus, little is known about its ecology. Undibacterium species are Betaproteobacteria in the family Oxalobacteraceae that have been isolated from soil and freshwater (55) and documented in shrimp intestines (56). Janthinobacterium, a relative of Undibacterium also in the family Oxalobacteraceae, did not show consistent effects between the laboratory and field studies but still merits discussion, given that it is possibly the best-studied bacterial genus in the context of Bd infection.…”