| Popis: |
A novel sulfur-oxidizing bacterium, strain Am19T , was isolated from sediment of a brackish lake. Strain Am19T grew chemolithotrophically on inorganic sulfur compounds, and heterotrophic growth was not observed. Cells were rod-shaped with length of 1.1–3.0 μm and width of 0.5–0.8 μm. Growth was observed at 5–37°C with an optimum growth temperature of 30°C. The pH range for growth was 5.6–8.5 with an optimum pH of 6.6–7.0. Major fatty acids were summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c), summed feature 8 (C18 : 1w7c and/or C18 : 1w6c) and C16 : 0. The sole respiratory quinone was ubiquinone-8. The complete genome of strain Am19T is composed of a circular chromosome with length of 2.5 Mbp and G + C content of 42.7 mol%. Phylogenetic analysis based on genomic data indicated that strain Am19 T belongs to the genus Thiomicrorhabdus but is distinct from any existing species. Analysis of the 16S rRNA gene supported creation of a new species to accommodate strain Am19T . On the basis of genomic and phenotypic characteristics, strain Am19T (= NBRC 114602T = BCRC 81336T ) is proposed as the type strain of a new species, with name of Thiomicrorhabdus immobilis sp. nov. |
