title: Arcicella rigui sp. nov., isolated from water of a wetland, and emended descriptions of the genus Arcicella, Arcicella aquatica, Arcicella rosea and Arcicella aurantiaca.
abstract: A bacterial strain, designated NSW-5(T), was isolated from a water sample taken from Niao-Song Wetland Park in Taiwan and characterized using a polyphasic taxonomic approach. Cells of strain NSW-5(T) were strictly aerobic, Gram-stain-negative, non-motile and polymorphic, being straight, vibrioid, curved and spiral-shaped rods surrounded by a thick capsule and forming light pink-coloured colonies. Some rings consisting of several cells were present. Growth occurred at 10-40 °C (optimum, 25 °C), with 0-3.0 % NaCl (optimum, 0 %) and at pH 6.0-8.0 (optimum, pH 7.0). Phylogenetic analyses based on 16S rRNA gene sequences showed that strain NSW-5(T) belonged to the genus Arcicella with sequence similarities of 98.6, 98.0 and 97.3 % with Arcicella aquatica NO-502(T), Arcicella rosea TW5(T) and Arcicella aurantiaca TNR-18(T), respectively. The predominant cellular fatty acids were summed feature 3 (C(16 : 1)ω7c and/or C(16 : 1)ω6c; 20.8 %), C(16 : 0) (14.6 %), iso-C(15 : 0) (13.8 %), C(16 : 1)ω5c (12.5 %) and C(18 : 0) (11.4 %), and the only respiratory quinone was MK-7. The polar lipid profile consisted of phosphatidylethanolamine and several uncharacterized glycolipids, aminolipids, phospholipids and aminophospholipids. The DNA G+C content of strain NSW-5(T) was 44.1 mol%. The DNA-DNA relatedness of strain NSW-5(T) with respect to recognized species of the genus Arcicella was less than 70 %. On the basis of phylogenetic inference and phenotypic data, strain NSW-5(T) should be classified as a representative of a novel species, for which the name Arcicella rigui sp. nov. is proposed. The type strain is NSW-5(T) (= KCTC 23307(T) = BCRC 80260(T)). Emended descriptions of the genus Arcicella and of Arcicella aquatica, Arcicella rosea and Arcicella aurantiaca are also proposed.
authors.affiliation: Laboratory of Microbiology, Department of Seafood Science, National Kaohsiung Marine University, 142 Hai-Chuan Road Nan-Tzu, Kaohsiung City 811, Taiwan, ROC.
authors.forename: Wen-Ming
authors.initials: WM
authors.lastname: Chen
authors.affiliation: Department of Marine Biotechnology, National Kaohsiung Marine University, 142 Hai-Chuan Road Nan-Tzu, Kaohsiung City 811, Taiwan, ROC.
authors.forename: Shwu-Harn
authors.initials: SH
authors.lastname: Yang
authors.affiliation: Department of Soil Environmental Science, College of Agriculture and Natural Resources, National Chung Hsing University, 250 Kuo Kuang Road, Taichung 402, Taiwan, ROC.
authors.forename: Chiu-Chung
authors.initials: CC
authors.lastname: Young
authors.affiliation: Department of Marine Biotechnology, National Kaohsiung Marine University, 142 Hai-Chuan Road Nan-Tzu, Kaohsiung City 811, Taiwan, ROC.
authors.forename: Shih-Yi
authors.initials: SY
authors.lastname: Sheu
mesh_terms: D015373:Bacterial Typing Techniques; D001482:Base Composition; D041964:Cytophagaceae / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D004269:DNA, Bacterial / Q000235:genetics; D005227:Fatty Acids / Q000032:analysis; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010743:Phospholipids / Q000032:analysis; D010802:Phylogeny; D011809:Quinones / Q000032:analysis; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D013624:Taiwan; D014871:Water Microbiology; D053833:Wetlands
chemical_list: D004269:DNA, Bacterial; D005227:Fatty Acids; D010743:Phospholipids; D011809:Quinones; D012336:RNA, Ribosomal, 16S