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Effect of different salicylic acid concentrations (0 to 500 μM) in the 1-h pretreatment on net K+ (A) and H+ (B) fluxes measured at the mature root zone of 4–5-day-old Arabidopsis thaliana wild-type (Col-0) seedlings in response to 100mM NaCl. Insets shows total K+ (nmol m–2) leaked out (negative flux) during 1h of salt treatment. Values are mean ± SE (n = 7 seedlings). Different letters in the inset indicate significant differences.
