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Volume 68, Issue 12

Alteromonas indica sp. nov., isolated from surface seawater from the Indian Ocean Free

Abstract

A Gram-stain-negative bacterium, designated strain IO390401, was isolated from a seawater sample from the sulphide region of the Indian Ocean. Phylogenetic trees based on 16S rRNA gene sequences showed that strain IO390401 is a member of the genus Alteromonas , sharing 97.0−97.4 % 16S rRNA gene sequence similarity with Alteromonas addita R10SW13, A. stellipolaris LMG 21861, A. naphthalenivorans JCM 17741, A. gracilis 9a2 and A. australica H17, and 94.8−96.8 % with the type strains of other species of the genus Alteromonas . Strain IO390401 contained ubiquinone-8 (Q-8) as the sole isoprenoid quinone, C16:0 and C16:1 ω7c/C16:1 ω6c as the dominant cellular fatty acids, and phosphatidylglycerol and phosphatidylethanolamine as the major polar lipids. The genome of strain IO390401 consists of a 4.4 Mb chromosome with a G+C content of 48.2 mol%. Average nucleotide identity values between strain IO390401 and the three closest phylogenetic neighbours, namely A. addita R10SW13, A. stellipolaris LMG 21861 and A. naphthalenivorans JCM 17741, were 70.5, 70.4 and 70.6 %, respectively, and the corresponding in silico DNA–DNA hybridization values were 20.6, 20.7 and 21.1 %. Phylogenetic distinctiveness and chemotaxonomic differences, together with phenotypic properties determined in this study, revealed that strain IO390401 could be differentiated from closely related species. It is therefore proposed as representing a novel species in the genus Alteromonas , for which the name Alteromonas indica sp. nov. is suggested. The type strain is IO390401 (=JCM 32638=CGMCC 1.13554=CCTCC AB 2018072).

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): Alteromonadaceae , Alteromonadales , Alteromonas , Alteromonas indica , Gammaproteobacteria and taxonomy
© 2018 IUMS
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2018-10-23
2024-04-25
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Alteromonas indica sp. nov., isolated from surface seawater from the Indian Ocean
Int J Syst Evol Microbiol 68, 3881 (2018); https://doi.org/10.1099/ijsem.0.003078
/content/journal/ijsem/10.1099/ijsem.0.003078
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