title: Aquabacterium limnoticum sp. nov., isolated from a freshwater spring.
abstract: A Gram-negative, facultatively anaerobic, short-rod-shaped, non-motile and non-spore-forming bacterial strain, designated ABP-4(T), was isolated from a freshwater spring in Taiwan and was characterized using the polyphasic taxonomy approach. Growth occurred at 20-40 °C (optimum, 30-37 °C), at pH 7.0-10.0 (optimum, pH 7.0-9.0) and with 0-3% NaCl (optimum, 0%). Phylogenetic analyses based on 16S rRNA gene sequences showed that strain ABP-4(T), together with Aquabacterium fontiphilum CS-6(T) (96.4% sequence similarity), Aquabacterium commune B8(T) (96.1%), Aquabacterium citratiphilum B4(T) (95.5%) and Aquabacterium parvum B6(T) (94.7%), formed a deep line within the order Burkholderiales. Strain ABP-4(T) contained summed feature 3 (comprising C(16:1) ω7c and/or C(16:1) ω6c), C(18:1) ω7c and C(16:0) as predominant fatty acids. The major cellular hydroxy fatty acid was C(10:0) 3-OH. The major isoprenoid quinone was Q-8 and the DNA G+C content was 68.6 mol%. The polar lipid profile consisted of a mixture of phosphatidylethanolamine, phosphatidylglycerol, phosphatidylserine, diphosphatidylglycerol and several uncharacterized phospholipids. The DNA-DNA relatedness of strain ABP-4(T) with respect to recognized species of the genus Aquabacterium was less than 70%. On the basis of the genotypic, chemotaxonomic and phenotypic data, strain ABP-4(T) represents a novel species in the genus Aquabacterium, for which the name Aquabacterium limnoticum sp. nov. is proposed. The type strain is ABP-4(T) (=BCRC 80167(T)=KCTC 23306(T)).
authors.affiliation: Laboratory of Microbiology, Department of Seafood Science, National Kaohsiung Marine University, no. 142, Hai-Chuan Rd, Nan-Tzu, Kaohsiung City 811, Taiwan, ROC.
authors.forename: Wen-Ming
authors.initials: WM
authors.lastname: Chen
authors.affiliation: Laboratory of Microbiology, Department of Seafood Science, National Kaohsiung Marine University, no. 142, Hai-Chuan Rd, Nan-Tzu, Kaohsiung City 811, Taiwan, ROC.
authors.forename: Nian-Tsz
authors.initials: NT
authors.lastname: Cho
authors.affiliation: Department of Marine Biotechnology, National Kaohsiung Marine University, no. 142, Hai-Chuan Rd, Nan-Tzu, Kaohsiung City 811, Taiwan, ROC.
authors.forename: Shwu-Harn
authors.initials: SH
authors.lastname: Yang
authors.affiliation: Yenepoya Research Center, Yenepoya University, University Rd, Deralakatee, Mangalore, Karnataka State, India.
authors.forename: A B
authors.initials: AB
authors.lastname: Arun
authors.affiliation: College of Agriculture and Natural Resources, Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung 402, Taiwan, ROC.
authors.forename: Chiu-Chung
authors.initials: CC
authors.lastname: Young
authors.affiliation: Department of Marine Biotechnology, National Kaohsiung Marine University, no. 142, Hai-Chuan Rd, Nan-Tzu, Kaohsiung City 811, Taiwan, ROC.
authors.forename: Shih-Yi
authors.initials: SY
authors.lastname: Sheu
mesh_terms: D000332:Aerobiosis; D000693:Anaerobiosis; D015373:Bacterial Typing Techniques; D001482:Base Composition; D016227:Benzoquinones / Q000032:analysis; D020562:Betaproteobacteria / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification* / Q000502:physiology; D016000:Cluster Analysis; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D005227:Fatty Acids / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D008969:Molecular Sequence Data; D060985:Natural Springs / Q000382:microbiology*; D009693:Nucleic Acid Hybridization; D010743:Phospholipids / Q000032:analysis; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D012965:Sodium Chloride / Q000378:metabolism; D013624:Taiwan; D013696:Temperature
chemical_list: D016227:Benzoquinones; D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005227:Fatty Acids; D010743:Phospholipids; D012336:RNA, Ribosomal, 16S; C004532:quinone; D012965:Sodium Chloride