title: Shewanella marisflavi sp. nov. and Shewanella aquimarina sp. nov., slightly halophilic organisms isolated from sea water of the Yellow Sea in Korea.
abstract: Two Gram-negative, motile, non-spore-forming, rod-shaped organisms, strains SW-117(T) and SW-120(T), were isolated from sea water of the Yellow Sea in Korea and subjected to a polyphasic taxonomic study. Strains SW-117(T) and SW-120(T) simultaneously contained both menaquinones (MK) and ubiquinones (Q) as isoprenoid quinones; the predominant menaquinone was MK-7 and the predominant ubiquinones were Q-7 and Q-8. The major fatty acid detected in the two strains was iso-C(15 : 0). The DNA G+C content of strains SW-117(T) and SW-120(T) was 51 and 54 mol%, respectively. Phylogenetic analyses based on 16S rRNA gene sequences showed that strains SW-117(T) and SW-120(T) fall within the radiation of the cluster comprising Shewanella species. Strains SW-117(T) and SW-120(T) showed a 16S rRNA gene sequence similarity of 97.4 % and a DNA-DNA relatedness level of 10.1 %. Strains SW-117(T) and SW-120(T) exhibited 16S rRNA gene sequence similarity levels of 93.8-98.5 % and 92.4-97.0 %, respectively, to Shewanella species. Strain SW-117(T) exhibited DNA-DNA relatedness levels of 8.3-20.3 % to the type strains of six phylogenetically related Shewanella species. On the basis of phenotypic, phylogenetic and genetic data, strains SW-117(T) and SW-120(T) were classified in the genus Shewanella as two distinct novel species, for which the names Shewanella marisflavi sp. nov. (type strain, SW-117(T)=KCCM 41822(T)=JCM 12192(T)) and Shewanella aquimarina sp. nov. (type strain, SW-120(T)=KCCM 41821(T)=JCM 12193(T)) are proposed, respectively.
authors.affiliation: Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon, Korea.
authors.forename: Jung-Hoon
authors.initials: JH
authors.lastname: Yoon
authors.affiliation: The Center for Traditional Microorganism Resources, Keimyung University, Shindang-Dong, Dalseo-gu, Daegu, Korea.
authors.forename: Soo-Hwan
authors.initials: SH
authors.lastname: Yeo
authors.affiliation: Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon, Korea.
authors.forename: In-Gi
authors.initials: IG
authors.lastname: Kim
authors.affiliation: Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon, Korea.
authors.forename: Tae-Kwang
authors.initials: TK
authors.lastname: Oh
mesh_terms: D015373:Bacterial Typing Techniques; D001482:Base Composition; D004269:DNA, Bacterial / Q000737:chemistry / Q000302:isolation & purification; D004275:DNA, Ribosomal / Q000737:chemistry / Q000302:isolation & purification; D005227:Fatty Acids / Q000032:analysis / Q000302:isolation & purification; D020459:Genes, rRNA; D005840:Gentian Violet; D007723:Korea; D008969:Molecular Sequence Data; D009068:Movement; D009792:Oceans and Seas; D010619:Phenazines; D010802:Phylogeny; D012329:RNA, Bacterial / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012623:Seawater / Q000382:microbiology*; D017422:Sequence Analysis, DNA; D020592:Shewanella / Q000145:classification* / Q000166:cytology / Q000302:isolation & purification* / Q000502:physiology; D013171:Spores, Bacterial; D014451:Ubiquinone / Q000032:analysis / Q000302:isolation & purification; D024482:Vitamin K 2 / Q000032:analysis / Q000302:isolation & purification; D014871:Water Microbiology
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005227:Fatty Acids; C035863:Gram's stain; D010619:Phenazines; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S; D024482:Vitamin K 2; D014451:Ubiquinone; D005840:Gentian Violet