RESUMO
A Gram-negative, aerobic, slightly yellow-pigmented bacterium, designated as SKLS-A10T, was isolated from groundwater sample of the 'Siklós' petroleum hydrocarbon contaminated site (Hungary). Phylogenetic analysis based on 16S rRNA gene sequence revealed that strain SKLS-A10T formed a distinct phyletic lineage within the genus Sphingobium. It shared the highest 16S rRNA gene homology with Sphingobium abikonense DSM 23268T (97.29â%), followed by Sphingobium lactosutens DSM 23389T (97.23â%), Sphingobium phenoxybenzoativorans KCTC 42448T (97.16â%) and Sphingobium subterraneum NBRC 109814T (96.74â%). The predominant fatty acids (>5â% of the total) are C18â:â1ω7c, C14â:â0 2-OH, C16â:â1ω7c/iso C15â:â0 2-OH, C17â:â1ω6c and C16â:â0. The major ubiquinone is Q-10. The predominant polyamine is spermidine. The major polar lipids are sphingoglycolipid and diphosphatidylglycerol. The DNA G+C content of strain SKLS-A10T is 65.9 mol%. On the basis of evidence from this taxonomic study using a polyphasic approach, strain SKLS-A10T represents a novel species of the genus Sphingobium for which the name Sphingobiumaquiterrae sp. nov. is proposed. The type strain is SKLS-A10T (=DSM 106441T=NCAIM B. 02634T).