[Metabolic characteristics of P. nigricans Thom. strains in the presence of varying carbon sources and under varying temperature conditions].

The effect of glucose, succinate and acetate, as well as elevated temperatures on the dynamics of the pyruvate, PEP and H-6-P levels in the mycelium of the strains of various productivity (117 and B) grown on the mineral medium was studied. It was found that in the presence of any of the carbon sources the initial levels of pyruvate and PEP in both strains were the same. The pyruvate level in strain 117 in the presence of glucose or succinate was stable, while in strain B it was variable. Strain B unlike strain 117 was subjected in the presence of glucose to transit repression. On the media with acetate both strains had the similar dynamics of the pyruvate and PEP concentrations but differed in the levels of H-6-P. Elevated temperatures of the medium induced changes in the concentrations of the metabolites of strain B in the presence of glucose and redoubled repression in the presence of succinate. The dynamics of the metabolite levels in the above strains exposed to elevated temperatures of the medium was also different.