title: The isolation and properties of a denitrifying bacterium of the genus Flavobacterium.
abstract: A previously undescribed denitrifying bacterium was isolated from soil. The cells are small gram-negative rods, asporogenous, and non-motile. Colonies become yellow after long exposure to light. This colouring is due to the production of a carotenoid pigment. The organism shows no fermenting activity, and grows only in the presence of one of the following electron acceptors: NO2, N2O, and O2. It does not reduce nitrate. It gives a positive oxidase test and has a cytochrome c and catalase. It requires no growth factors, is a chemoorganotroph and uses only sugars as carbon and energy supply. The DNA base composition is 40.8 moles percent GC. Although presenting the physiological characteristics of a pseudomonad, the organism described has been placed in the genus Flavobacterium because of its pigmentation and its low GC percentage.
mesh_terms: D000332:Aerobiosis; D000693:Anaerobiosis; D050260:Carbohydrate Metabolism; D002338:Carotenoids / Q000096:biosynthesis; D004579:Electron Transport; D005417:Flavobacterium / Q000302:isolation & purification* / Q000378:metabolism; D009566:Nitrates / Q000378:metabolism; D009585:Nitrogen Dioxide / Q000378:metabolism; D009609:Nitrous Oxide / Q000378:metabolism; D010084:Oxidation-Reduction; D010101:Oxygen Consumption; D012988:Soil Microbiology
chemical_list: D009566:Nitrates; D002338:Carotenoids; D009609:Nitrous Oxide; D009585:Nitrogen Dioxide