title: [Diauxotrophic properties of microorganisms assimilating C2--C4 hydrocarbons].
abstract: Diauxotrophic properties of bacteria assimilating gaseous hydrocarbons C2--C4  and other complex organic substances but not methane were studied. If the medium contained two substrates (hydrocarbon+carbohydrate), the non-growing cells of the strains did not display diauxotrophic properties. In the phase of exponential growth, oxygen-containing carbon sources and then gaseous hydrocarbons were assimilated, i.e. diauxia was observed. If a microbial association containing an obligate methylotroph and a facultative gas-assimilating culture was grown on a medium with a natural gas, the latter culture assimilated carbon-containing metabolites of the methylotroph and then, when their concentration decreased, gaseous hydrocarbons. The order in which complex organic substances (exometabolites of methylotrophs) and hydrocarbons C2--C4 were assimilated was determined by their concentration in the medium. In the course of growth of such a microbial association, the inhibiting effect of metabolites of methylotrophs on their growth decreased as well as the loss of methane being transformed by methylotrophs into exometabolites, and hydrocarbons C2--C4 were utilized.
mesh_terms: D004980:Ethane / Q000378:metabolism; D005947:Glucose / Q000378:metabolism; D008697:Methane / Q000378:metabolism; D008772:Methylococcaceae / Q000254:growth & development / Q000378:metabolism*; D009615:Nocardia / Q000254:growth & development / Q000378:metabolism*; D011407:Propane / Q000378:metabolism; D013045:Species Specificity
chemical_list: D005947:Glucose; D004980:Ethane; D008697:Methane; D011407:Propane
vernacular_title: Diauksotrofnye svoistva mikroorganizmov, assimiliruiushchikh uglevodorody C2--C4.