Simiduia aestuariiviva sp. nov., a gammaproteobacterium isolated from a tidal flat sediment
2014
Park, Sooyeon | Kim, Soo-In | Kang, Chul-Hyung | Park, Ji-Min | Yoon, Jung-Hoon
A Gram-stain negative, aerobic, motile and rod-shaped bacterial strain, designated J-MY2ᵀ, was isolated from a tidal flat sediment of the South Sea, South Korea. Strain J-MY2ᵀ was found to grow optimally at 30 °C, at pH 7.0–8.0 and in the presence of 2.0 % (w/v) NaCl. Phylogenetic trees based on 16S rRNA gene sequences revealed that strain J-MY2ᵀ forms a cluster with the type strains of Simiduia species. Strain J-MY2ᵀ exhibited 16S rRNA gene sequence similarity values of 97.62–98.77 % to the type strains of four Simiduia species and of <92.95 % sequence similarity to the type strains of the other recognized species. Strain J-MY2ᵀ was found to contain Q-8 as the predominant ubiquinone and summed feature 3 (C₁₆:₁ ω7c and/or C₁₆:₁ ω6c), C₁₆:₀, C₁₈:₁ ω7c and C₁₇:₁ ω8c as the major fatty acids. The major polar lipids of strain J-MY2ᵀ were identified as phosphatidylethanolamine, phosphatidylglycerol, three unidentified glycolipids and one unidentified lipid. The DNA G+C content of strain J-MY2ᵀ was determined to be 54.8 mol% and its mean DNA–DNA relatedness values with the type strains of the four Simiduia species were in the range 21–34 %. The differential phenotypic properties, together with the phylogenetic and genetic distinctiveness, revealed that strain J-MY2ᵀ is separated from other Simiduia species. On the basis of the data presented, strain J-MY2ᵀ is considered to represent a novel species of the genus Simiduia, for which the name Simiduia aestuariiviva sp. nov. is proposed. The type strain is J-MY2ᵀ ( = KCTC 42073ᵀ = CECT 8571ᵀ).
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