Fig. 9.

Na⁺/K⁺ homeostasis in sapk1, sapk2 and sapk1/2 mutants; SAPK1-OE, SAPK2-OE plants and wild-type plants. (a) and (d)Na⁺ contents: 4-week-old plants were treated with 0 mM or 175 mM NaCl and samples were harvested 5 days later. (b) and (e) K⁺ contents: 4-week-old plants were treated with 0 mM or 175 mM NaCl and samples were harvested 5 days later. (c) and (f) Na⁺/K⁺ ratio. Values shown are means from three independent experiments. Error bars indicate the SD (n = 3). ** indicate statistically significant differences between mutant lines and wild type plants (P < 0.01)