Chryseobacterium chungangensis sp. nov., a bacterium isolated from soil of sweet gourd garden.

A novel bacterial strain, named MAH-7T, was isolated from a soil sample of a Korean sweet gourd garden and was characterized using a polyphasic approach. Cells were Gram-staining negative, orange colored, non-motile and rod shaped. The strain was aerobic and catalase, oxidase positive, optimum growth temperature and pH were 28-30 °C and 7.0, respectively. On the basis of 16S rRNA gene sequence analysis, strain MAH-7T belongs to the genus Chryseobacterium and is most closely related to Chryseobacterium formosense CC-H3-2T (97.96%) and Chryseobacterium zeae JM-1085T (97.19%). In DNA-DNA hybridization tests, the DNA relatedness between strain MAH-7T and its closest phylogenetic neighbors were below 45.0%. The DNA G+C content was 37.6 mol% and the predominant respiratory quinone was menaquinone-6 (MK-6). Flexirubin-type pigments were found to be present. The major cellular fatty acids were C15:0 iso, C17:0 iso 3OH, C17:1 isoω9c and summed feature 3 (C16:1ω7c and/or C16:1ω6c). The DNA-DNA hybridization results and results of the genotypic analysis in combination with chemotaxonomic and physiological data demonstrated that strain MAH-7T represented a novel species within the genus Chryseobacterium, for which the name Chryseobacterium chungangensis is proposed. The type strain is MAH-7T (= KACC 19293T = CGMCC 1.16232T). The NCBI GenBank accession number for the 16S rRNA gene sequence of strain MAH-7T is KY964274.