- Volume 59, Issue 11, 2009
Volume 59, Issue 11, 2009
- New Taxa
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- Proteobacteria
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Luteibacter anthropi sp. nov., isolated from human blood, and reclassification of Dyella yeojuensis Kim et al. 2006 as Luteibacter yeojuensis comb. nov.
More LessA yellow-pigmented bacterium was isolated from blood of a 3-year-old boy in Göteborg, Sweden. Comparative analysis of 16S rRNA gene sequences showed that this bacterium is most closely related to Luteibacter rhizovicinus LJ96T and Dyella yeojuensis R2A16-10T, with sequence similarity of 98.3 % to both. Strain CCUG 25036T is clearly different from L. rhizovicinus CCUG 50033T and also from D. yeojuensis DSM 17673T in that DNA–DNA hybridization revealed relatedness of 33.7 and 29.8 %, respectively. Strain CCUG 25036T is further distinguished from L. rhizovicinus CCUG 50033T and D. yeojuensis DSM 17673T by being able to use d-mannose, d-mannitol and gluconate as sole carbon sources and by lacking the ability to use maltose or sucrose as sole carbon sources. The name Luteibacter anthropi sp. nov. is proposed for this novel species, with the type strain CCUG 25036T (=CCM 7598T). The proposal is also made to reclassify Dyella yeojuensis as Luteibacter yeojuensis comb. nov., with the type strain R2A16-10T (=DSM 17673T =KACC 11405T).
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Halomonas zhanjiangensis sp. nov., a halophilic bacterium isolated from a sea urchin
A novel Gram-negative, slightly halophilic, catalase-positive, oxidase-negative, obligately aerobic, non-sporulating rod-shaped bacterium, designated strain JSM 078169T, was isolated from a sea urchin (Hemicentrotus pulcherrimus) collected from the South China Sea. Growth occurred with 1–20 % (w/v) total salts (optimum, 3–5 %), at pH 6.0–10.5 (optimum, pH 7.5) and at 4–40 °C (optimum, 25–30 °C). The major cellular fatty acids were C18 : 1 ω7c, C16 : 0 and C12 : 0 3-OH. The predominant respiratory quinone was Q-9 and the genomic DNA G+C content was 55.8 mol%. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain JSM 078169T should be assigned to the genus Halomonas. The sequence similarities between the isolate and the type strains of members of the genus Halomonas were in the range 92.4–97.0 %. The combination of phylogenetic analysis, DNA–DNA relatedness, phenotypic characteristics and chemotaxonomic data supported the view that strain JSM 078169T represents a novel species of the genus Halomonas, for which the name Halomonas zhanjiangensis sp. nov. is proposed, with JSM 078169T (=CCTCC AB 208031T=DSM 21076T=KCTC 22279T) as the type strain.
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Methylophilus rhizosphaerae sp. nov., a restricted facultative methylotroph isolated from rice rhizosphere soil
More LessThree facultative methylotrophic bacterial strains, designated CBMB127T, CBMB145 and CBMB147, were isolated from the rhizosphere soil of rice and characterized. The strains produced indole-3-acetic acid and siderophores, had 1-aminocyclopropane-1-carboxylate deaminase activity and sulfur oxidation property and also methanol dehydrogenase. Phylogenetic analysis based on the 16S rRNA and methanol dehydrogenase (mxaF) gene sequences showed that Methylophilus methylotrophus was their close relative. The results of the phenotypic, phylogenetic and genotypic analyses showed that strains CBMB127T and CBMB145, with 99.4 % 16S rRNA gene sequence similarity and 99 % DNA–DNA hybridization, could be distinguished from recognized species of Methylophilus. Therefore strain CBMB127T and CBMB145 are considered to represent a novel species of Methylophilus, for which the name Methylophilus rhizosphaerae sp. nov. is proposed, with CBMB127T (=KACC 13099T=NCCB 100233T) as the type strain. Strain CBMB147 represents a novel strain of the species Methylophilus methylotrophus.
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- International Committee On Systematics Of Prokaryotes
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- Request For An Opinion
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Proposal of Spirillum winogradskyi sp. nov., a novel microaerophilic species, an emended description of the genus Spirillum and Request for an Opinion regarding the status of the species Spirillum volutans Ehrenberg 1832
A novel obligately organotrophic, facultatively microaerophilic spirillum, designated strain D-427T, was isolated from sulfidic sludge of a municipal wastewater-treatment plant. Cells were Gram-negative, large and highly motile due to bipolar tufts of flagella covered with mucous sheaths. Coccoid cells were sometimes formed. Strain D-427T grew optimally at pH 7.5–7.8 and 28 °C in the presence of 2 % O2 in the gas phase. The organism showed oxidase and very low catalase activity. The isolate grew chemo-organotrophically with a limited number of organic acids as substrates. The DNA G+C content was 38.0 mol% (T m). Phylogenetic analysis of the 16S rRNA gene sequence placed strain D-427T in the genus Spirillum within the class Betaproteobacteria. The 16S rRNA gene sequence similarity between strain D-427T and Spirillum volutans ATCC 19554T, the type strain of the single species of the genus, was 98.6 %. The low level of DNA–DNA hybridization and different phenotypic properties indicate that strain D-427T is clearly distinguishable from Spirillum volutans. No strain of S. volutans is available from any established culture collection or from the authors who described this species. Therefore, on the basis of phenotypic and genotypic data and the fact that the type and single species of the genus Spirillum cannot be included in any scientific study, since the type strain has been lost, we propose to assign strain D-427T as a novel species of the genus Spirillum, Spirillum winogradskyi sp. nov. (type strain D-427T =DSM 12756T =VKM B-2518T), and we request that the Judicial Commission place the name Spirillum volutans on the list of rejected names if a suitable type strain is not found or a neotype is not proposed within 2 years following the publication of this paper. An emended description of the genus Spirillum is also provided.
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Volumes and issues
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Volume 74 (2024)
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