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Mutations in pacC affect ion homeostasis. Intracellular accumulation of cations was determined in germlings of the F. oxysporum wild-type strain (□), loss-of-function mutant pacC+/− (▧), or dominant activating mutant pacCc (▪) grown for 12 h in the presence of the indicated concentrations of Li+ (A and C) or Na+ (B).
