Skip to content
1887

INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY logo - Volume 69, Issue 3, 2019

Volume 69, Issue 3

Volume 69, Issue 3, 2019

  • New Taxa
    • Proteobacteria

      • Pararhodobacter oceanensis sp. nov., isolated from marine intertidal sediment and emended description of the genus Pararhodobacter

        https://doi.org/10.1099/ijsem.0.003255

        A Gram-stain-negative, rod-shaped, non-motile and facultatively anaerobic bacterium, designated AM505, was isolated from Shuangdao Bay in Weihai, China. Cells of strain AM505 were 0.4–0.8 µm wide, 1.3–3.3 µm long, catalase-positive and oxidase-positive. Strain AM505 was tolerant to moderate salt conditions. Growth occurred at 4–40 °C (optimum, 28–33 °C), pH 6.5–9.5 (pH 7.5–8.0) and with 0.5–9.0 % NaCl (w/v; 2.0–4.0 %). A phylogenetic analysis of the 16S rRNA gene indicated that strain AM505 was a member of the genus Pararhodobacter within the family Rhodobacteraceae. The most closely related neighbour was Pararhodobacter aggregans DSM 18938 (97.6 %). The average nucleotide identity value between AM505 and P. aggregans DSM 18938 was 75.3 %. The major respiratory quinone of strain AM505 was ubiquinone-10 and the predominant cellular fatty acids (>10 %) were summed feature 8 (consisting of C18 : 1 ω7c and/or C18 : 1 ω6c), 11-methyl C18 : 1 ω7c and C18 : 0. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine and an unidentified aminolipid. The genomic DNA G+C content was 63.0 mol%. Based on our polyphasic taxonomic study, strain AM505 should be a novel species in the genus Pararhodobacter , for which the name Pararhodobacter oceanensis sp. nov. is proposed. The type strain is AM505 (=KCTC 62407=MCCC 1H00289).

  • Eukaryotic Micro-Organisms

    • Vishniacozyma ellesmerensis sp. nov., a psychrophilic yeast isolated from a retreating glacier in the Canadian High Arctic

      https://doi.org/10.1099/ijsem.0.003206

      Two strains of a psychrophilic basidiomycetous yeast species belonging to the genus Vishniacozyma were isolated from sediments and soil at the front of a retreating glacier on northern Ellesmere Island in the Canadian Arctic. Analysis of the large subunit D1/D2 region and the internal transcribed spacer (ITS) regions of the rDNA indicated that these strains represented a novel species. The closest relatives of the novel species were Vishniacozyma globispora and V. dimennae, which exhibited sequence similarities of 82.2 and 81.6 %, respectively, to the ITS region of the novel species, and contained 61 and 57 nt substitutions, respectively, in the D1/D2 domain, in comparison with the novel species. Strains of the novel species were able to grow at sub-zero temperatures and in vitamin-free medium. These characteristics allow the strains to survive and grow in perennially cold, oligotrophic habitats in the Canadian High Arctic. The name Vishniacozyma ellesmerensis sp. nov. is proposed. The type strain is JCM 32573 (=UAMH 11973=G3-4-8) and the MycoBank number is MB825501.

Top
Top
◄ 1 2 3
20 | 50 | 100 per page

Volumes and issues

Most cited Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error