Streptomyces glycovorans sp. nov., Streptomyces xishensis sp. nov. and Streptomyces abyssalis sp. nov., isolated from marine sediments

Abstract

Strains YIM M 10366T, YIM M 10378T and YIM M 10400T were isolated from marine sediments collected from the Xisha Islands in the South China Sea. All three isolates were able to grow optimally at pH 7.0, 28–37 °C and 0–3 % (w/v) NaCl. Comparison of 16S rRNA gene sequences showed that these strains are members of the genus Streptomyces , exhibiting moderately high 16S rRNA gene sequence similarities of 97.0–98.8 % to members of the most closely related Streptomyces species. Morphological characteristics, physiological characteristics and compositions of whole-cell sugars and phospholipids are consistent with the diagnostic characteristics of the genus Streptomyces , but still allowed differentiation amongst the three strains and their neighbours. Based on 16S rRNA gene sequence analysis, DNA–DNA relatedness, phenotypic characteristics and chemotaxonomic data, strains YIM M 10366T, YIM M 10378T and YIM M 10400T were identified as members of three novel species of the genus Streptomyces , for which the names Streptomyces glycovorans sp. nov. (type strain YIM M 10366T  = DSM 42021T  = CCTCC AA2010005T), Streptomyces xishensis sp. nov. (type strain YIM M 10378T  = DSM 42022T  = CCTCC AA 2010006T) and Streptomyces abyssalis sp. nov. (type strain YIM M 10400T  = DSM 42024T  = CCTCC AA 2010008T) are proposed.