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Int J Syst Evol Microbiol 59 (2009), 2176-2179; DOI  10.1099/ijs.0.005819-0
© 2009 International Union of Microbiological Societies

Spongiibacter tropicus sp. nov., isolated from a Synechococcus culture

Chung Yeon Hwang and Byung Cheol Cho

School of Earth and Environmental Sciences and Research Institute of Oceanography, Seoul National University, San 56-1, Shillim-dong, Kwanak-gu, Seoul 151-742, Republic of Korea

Correspondence
Byung Cheol Cho
bccho{at}snu.ac.kr

Two Gram-staining-negative, rod-shaped and non-motile strains, designated CL-CB221T and CL-CB467, were isolated from a Synechococcus culture derived from tropical surface water of the Pacific Ocean. The 16S rRNA gene sequences of the two strains were identical, and it was found that they belonged to the class Gammaproteobacteria, with Spongiibacter marinus HAL40bT as their closest relative (similarity of 96.3 %). Both strains grew optimally at 30–35 °C and pH 7–8 in the presence of 3–4 % (w/v) NaCl. The major cellular fatty acids were C18 : 1{omega}7c, C17 : 1{omega}8c, C16 : 0 and summed feature 3 (C16 : 1{omega}7c and/or iso-C15 : 0 2-OH). The genomic DNA G+C contents were 57.7 and 57.8 mol%, respectively. DNA–DNA hybridization experiments revealed high values (97±2 %) for relatedness between strains CL-CB221T and CL-CB467, which suggested that these two strains belong to a single species. Based on the phylogenetic, chemotaxonomic and phenotypic data presented, it is proposed that strains CL-CB221T and CL-CB467 represent a novel species of the genus Spongiibacter, for which the name Spongiibacter tropicus sp. nov. is proposed. The type strain is CL-CB221T (=KCCM 90065T =DSM 19543T).

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains CL-CB221T and CL-CB467 are respectively EF988653 and EF988654.

A supplementary table showing cellular fatty acid compositions is available with the online version of this paper.






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Copyright © 2009 by the International Union of Microbiological Societies.