Membrane potentials of Dictyostelium discoideum cells at the pseudoplasmodial stage

Abstract The difference in membrane potentials between prestalk cells and prespore cells has been examined with reference to the formation of cellular pattern in the pseudoplasmodium (slug) of D. discoideum . Each cell at a different concentration of cAMP had a characteristic membrane potential. In addition, differences in and reversal of membrane potentials occurred between the two types of cell. The results indicate that the changes in membrane potential in both types of cell are closely correlated with the changes in chemotactic movement in response to cAMP.