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A Gram-stain-negative, Na+-requiring bacterial strain, designated B20-1T, was isolated from soil of the root system of mangrove forest. Cells were curved rods and motile by means of a polar flagellum. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain B20-1T belonged to the genus Marinomonas , sharing highest sequence similarities with Marinomonas rhizomae IVIA-Po-145T (97.6 %), Marinomonas dokdonensis DSW10-10T (97.0 %) and Marinomonas foliarum IVIA-Po-155T (96.9 %). The predominant cellular fatty acids of strain B20-1T were C10 : 0 3-OH, C18 : 1ω7c, summed feature 3 (C16 : 1ω7c and/or iso-C15 : 0 2-OH) and C16 : 0. Phosphatidylethanolamine and phosphatidylglycerol were identified as the predominant phospholipids. The predominant ubiquinone was Q-8. The genomic DNA G+C content of strain B20-1T was 46.6 mol%. On the basis of phenotypic characteristics, phylogenetic analysis and DNA–DNA relatedness, a novel species, Marinomonas mangrovi sp. nov., is proposed with B20-1T ( = DSM 28136T = LMG 28077T) as the type strain.
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