Factors influencing tartrate uptake by Penicillium charlesii

Abstract

The uptake of tartrate by P. clcnrlesii has been studied for cult~~res that were either aerated by shaking or were kept stationary. Stationary cultures were permeable to tartrate when high concentrations of NH4+ (above 36 mM) and glucose (278 mM) were present. Manganous ion (10-5 M ) was required for the uptake of tartrate by stationary cultures containing high concentrations of NH4+. Both stationary and shake cultures were able to remove tartrate from the medium when the glucose concentration was reduced below 278 mM; the process was then no longer dependent upon the presence of MnZ1-. The influence of changes in the concentrations of glucose and NH4+ was not related to the biochemical events of spore germination.