title: Polaromonas aquatica sp. nov., isolated from tap water.
abstract: Two Gram-negative, rod-shaped, non-spore-forming bacteria (CCUG 39402T and CCUG 39797), isolated from different water sources, were investigated in a polyphasic study. The two isolates shared 100% 16S rRNA gene sequence similarity and it was shown that they belonged to the Betaproteobacteria, most closely related to Polaromonas vacuolata (97.8%) and Polaromonas naphthalenivorans (97.8%). A polyamine pattern with 2-hydroxyputrescine and putrescine, as well as ubiquinone Q-8, were in agreement with characteristics of Betaproteobacteria. The presence of diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine, and major fatty acids C(16:1)omega7c, C(16:0) and C(17:0) cyclo supported the affiliation of the two strains to the genus Polaromonas. The results of DNA-DNA hybridization and physiological and biochemical tests allowed genotypic and phenotypic differentiation of the two isolates from the two Polaromonas species with validly published names. They therefore represent a novel species, for which the name Polaromonas aquatica sp. nov. is proposed, with the type strain CCUG 39402T (= CIP 108776T).
authors.affiliation: Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 26-32, D-35392 Giessen, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Kämpfer
authors.affiliation: Institut für Bakteriologie, Mykologie und Hygiene, Veterinärmedizinische Universität Wien, A-1210 Wien, Austria.
authors.forename: Hans-Jürgen
authors.initials: HJ
authors.lastname: Busse
authors.affiliation: CCUG, Culture Collection University of Göteborg, Göteborg, Sweden.
authors.forename: Enevold
authors.initials: E
authors.lastname: Falsen
mesh_terms: D020562:Betaproteobacteria / Q000737:chemistry / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D004275:DNA, Ribosomal / Q000737:chemistry; D005227:Fatty Acids / Q000032:analysis; D009693:Nucleic Acid Hybridization; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D013548:Sweden; D014871:Water Microbiology; D014881:Water Supply
chemical_list: D004275:DNA, Ribosomal; D005227:Fatty Acids; D012336:RNA, Ribosomal, 16S