1887

Abstract

Three strains (14A-2-7, 14A-3-1 and 14A-3) of Gram-stain-negative, prosthecate, motile bacteria were isolated from an algal medium supplemented with 10 mg ampicillin l (w/v), in which the red alga had been cultured. Based on the 16S rRNA gene sequence analysis, the three isolates formed a cluster with the genus of the family . The sequences of the three isolates had high similarity with those of 0C-2-2 (97.6 % similarity) and G5 (95.6 % similarity). The DNA G+C contents of the three isolates ranged from 54.3 to 55.0 mol%, which were more similar to that of 0C-2-2 (58.5 mol%) than to that of G5 (47.1 mol%). The DNA–DNA relatedness showed that the three isolates were representatives of the same species (88.1–94.0 % relatedness) and that strain 14A-2-7 was a representative of a different species from 0C-2-2 and G5 (1.2–8.6 % relatedness). The phenotypic characteristics of strain 14A-2-7 differed by 20 results and 30 results from 0C-2-2 and G5, respectively. The three isolates contained ubiquinone-10 as the predominant quinone and Cω7 as the major fatty acid. Based on the polyphasic taxonomic analysis, the three isolates represent a novel species of the genus , for which the name sp. nov. is proposed. The type strain is 14A-2-7 ( = LMG 26421 = NBRC 108219). An emended description of the genus is also proposed.

Funding
This study was supported by the:
  • , Japan Society for the Promotion of Science
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2013-12-01
2020-08-05
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