Defluviimonas pyrenivorans sp. nov., a novel bacterium capable of degrading polycyclic aromatic hydrocarbons.

An aerobic, Gram-stain-negative, rod-shaped, non-motile bacterium capable of degrading the polycyclic aromatic hydrocarbon pyrene was isolated from sediment of Pearl River and designated PrR001. 16S rRNA gene sequence analysis revealed that this strain was affiliated within the genus Defluviimonas in the family Rhodobacteraceae of the class Alphaproteobacteria and showed great similarity with the type strain Defluviimonas indica 20V17 (96.3 % similarity). The DNA G+C content of strain PrR001 was 68.3 mol%. The major cellular fatty acids comprised summed feature 8 (C18 : 1ω7c/C18 : 1ω6c), C19 : 0 cyclo ω8c, C18 : 0 3OH, and C18 : 0. The sole respiratory lipoquinone was ubiquinone-10. The main polar lipids were diphosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, an unidentified aminolipid, an unidentified aminophospholipid and three unidentified phospholipids. Based on physiological, chemotaxonomic and phylogenetic analysis, strain PrR001 is suggested as a novel species in the genus Defluviimonas, for which the name Defluviimonas pyrenivorans sp. nov. is proposed. The type strain of Defluviimonas pyrenivorans is PrR001 (=CICC 24263=KCTC 62192).