Sphingomicrobium marinum sp. nov. and Sphingomicrobium flavum sp. nov., isolated from surface seawater, and emended description of the genus Sphingomicrobium
Shahina, Mariyam and Hameed, Asif and Lin, Shih-Yao and Hsu, Yi-Han and Liu, You-Cheng and Huang, Yu-Ming and Lin, Jou-Chun and Young, Chiu-Chung,, 63, 4469-4476 (2013),
doi = https://doi.org/10.1099/ijs.0.052837-0,
publicationName = Microbiology Society,
issn = 1466-5026,
abstract= Two Gram-staining-negative, yellow-pigmented, rod-shaped, strictly aerobic, non-flagellated and non-spore-forming amylolytic marine bacterial strains, designated CC-AMZ-30MT and CC-AMZ-30NT, were isolated from coastal surface seawater in Taiwan. Strain CC-AMZ-30MT shared pairwise 16S rRNA gene sequence similarities of 95.8, 95.0 and <94.0 % to Sphingomicrobium lutaoense CC-TBT-3T, Sphingomicrobium astaxanthinifaciens CC-AMO-30BT and other sphingomonads, respectively. Strain CC-AMZ-30NT shared 97.0, 96.7, 95.0 and <95.1 % similarities to strain CC-AMZ-30MT, Sphingomicrobium lutaoense CC-TBT-3T, Sphingomicrobium astaxanthinifaciens CC-AMO-30BT and other sphingomonads, respectively. The common polar lipids of the two strains include a signature glycolipid (GL2), diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and sphingoglycolipid in major amounts besides moderate-to-trace amounts of an unidentified aminolipid and several unidentified glycolipids. Both strains contained C18 : 1ω7c/C18 : 1ω6c, C16 : 1ω7c/C16 : 1ω6c, C16 : 0 and C18 : 1 2-OH as major (>5 % of the total) fatty acids. Strains CC-AMZ-30MT and CC-AMZ-30NT had DNA G+C contents of 64.2 and 65.2 mol%, respectively. The major polyamine was spermidine in strain CC-AMZ-30MT and triamine sym-homospermidine in strain CC-AMZ-30NT. Both strains contained ubiquinone Q-10 as the predominant respiratory quinone. Differential phylogenetic and chemotaxonomic evidence including the presence of characteristic GL2, C18 : 1 2-OH and several other phenotypic features supported the classification of strains CC-AMZ-30MT and CC-AMZ-30NT as two novel species of the genus Sphingomicrobium , for which we propose the names Sphingomicrobium marinum sp. nov. and Sphingomicrobium flavum sp. nov., respectively; corresponding type strains are Sphingomicrobium marinum CC-AMZ-30MT ( = JCM 18554T = BCRC 80466T) and Sphingomicrobium flavum CC-AMZ-30NT ( = JCM 18555T = BCRC 80467T). An emended description of the genus Sphingomicrobium is also proposed.,
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