title: Psychrobacter aquimaris sp. nov. and Psychrobacter namhaensis sp. nov., isolated from sea water of the South Sea in Korea.
abstract: Two Gram-negative, non-motile, non-spore-forming, slightly halophilic bacterial strains, SW-210(T) and SW-242(T), were isolated from sea water of the South Sea in Korea, and were characterized taxonomically by means of a polyphasic approach. The two isolates grew optimally at 25-30 degrees C and in the presence of 2-3 % (w/v) NaCl. Strains SW-210(T) and SW-242(T) contained Q-8 as the predominant respiratory lipoquinone and C(18 : 1)omega9c as the major fatty acid. The DNA G+C contents of strains SW-210(T) and SW-242(T) were 43.2 and 45.3 mol%, respectively. The 16S rRNA gene sequences of strains SW-210(T) and SW-242(T) were 98.9 % similar, and the mean DNA-DNA relatedness value between them was 24 %. Phylogenetic analysis based on 16S rRNA gene sequences showed that strains SW-210(T) and SW-242(T) form distinct phylogenetic lineages within the radiation of the cluster comprising Psychrobacter species, having 16S rRNA gene sequence similarity levels of 95.9-99.2 % with respect to the type strains of Psychrobacter species. The levels of DNA-DNA relatedness between the two isolates and the type strains of 15 phylogenetically related Psychrobacter species were well below 70 %. On the basis of phenotypic and phylogenetic data and genomic distinctiveness, strains SW-210(T) and SW-242(T) were classified in the genus Psychrobacter as representing two distinct novel species, for which the names Psychrobacter aquimaris sp. nov. (type strain, SW-210(T) = KCTC 12254(T) = DSM 16329(T)) and Psychrobacter namhaensis sp. nov. (type strain, SW-242(T) = KCTC 12255(T) = DSM 16330(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: Korea Research Institute of Bioscience and Biotechnology (KRIBB), PO Box 115, Yusong, Taejon, Korea.
authors.forename: Choong-Hwan
authors.initials: CH
authors.lastname: Lee
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: Tae-Kwang
authors.initials: TK
authors.lastname: Oh
mesh_terms: D001482:Base Composition; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D005227:Fatty Acids / Q000032:analysis; D020459:Genes, rRNA; D005840:Gentian Violet; D007723:Korea; D008969:Molecular Sequence Data; D009068:Movement; D009693:Nucleic Acid Hybridization; D010619:Phenazines; D010802:Phylogeny; D044096:Psychrobacter / Q000145:classification* / Q000166:cytology / Q000302:isolation & purification* / Q000502:physiology; D011809:Quinones / Q000032:analysis; D012329:RNA, Bacterial / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012623:Seawater / Q000382:microbiology*; D017422:Sequence Analysis, DNA; D012965:Sodium Chloride / Q000494:pharmacology; D013696:Temperature; D014871:Water Microbiology
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005227:Fatty Acids; C035863:Gram's stain; D010619:Phenazines; D011809:Quinones; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S; D012965:Sodium Chloride; D005840:Gentian Violet