Cupric ions induce both an efflux of potassium and low molecular mass metabolites in Pseudomonas syringae

Abstract Cu²⁺ induced an efflux of potassium, inorganic phosphate, 260 nm-absorbing materials and ribose-containing molecules in Pseudomonas syringae . No detectable amounts of aspartic and glutamic acids leaked from the cells. It is proposed that the release of inorganic phosphate and other low molecular mass anionic metabolites probably played a role in re-equilibrating the internal charge balance after the exit of K⁺ ions.