International Journal of Systematic and Evolutionary Microbiology, Vol 50, 265-271, Copyright © 2000 by International Union of Microbiological Societies

ARTICLES

Assignment of Alteromonas elyakovii KMM 162(T) and five strains isolated from spot-wounded fronds of Laminaria japonica to Pseudoalteromonas elyakovii comb. nov. and the extended description of the species

T Sawabe, R Tanaka, MM Iqbal, K Tajima, Y Ezura, EP Ivanova and R Christen
Laboratory of Microbiology, Faculty of Fisheries, Hokkaido University, 3-1-1 Minato-cho, Hakodate 041, Japan

A marine bacterium, Alteromonas elyakovii KMM 162(T), which was described recently, and five strains isolated from spot-wounded fronds of Laminaria japonica have been subjected to phylogenetic analysis, and geno- and phenotypic characterization. The phenotypic features of Pseudoalteromonas elyakovii strains were closely related to that of Pseudoalteromonas espejiana IAM 12640(T), but utilization of three carbon compounds (D-mannose, L-tyrosine and trehalose) distinguished both species. The G+C content of Pseudoalteromonas elyakovii was between 38.5 and 38.9 mol%. Pseudoalteromonas elyakovii KMM 162(T) and the five Laminaria isolates constitute a single species different from any other Alteromonas and Pseudoalteromonas species as revealed by DNA--DNA hybridization data, especially Pseudoalteromonas distincta KMM 638(T) (52.4%), Pseudoalteromonas citrea KMM 216 (49.5%), Pseudoalteromonas carrageenovora NCIMB 302(T) (46.9%) and Pseudoalteromonas espejiana IAM 12640(T) (29.9%). All the data indicated that Alteromonas elyakovii KMM 162(T) should be reclassified as Pseudoalteromonas elyakovii and five strains isolated from Laminaria japonica have to be included in the species. Pseudoalteromonas elyakovii comb. nov. (type strain, KMM 162(T)=ATCC 700519(T)) is proposed and a set of phenotypic features which differentiate the Pseudoalteromonas species is described.

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