Figure 6

Effect of Na⁺ on the concentrations of ¹³³Cs, K⁺, and Na⁺ in the shoots and roots of Arabidopsis thaliana Columbia (WT) and sos2-1 mutant. (a,b) ¹³³Cs concentrations in (a) shoots and (b) roots. (c,d) Na⁺ concentrations in (c) shoots and (d) roots. (e,f) K⁺ concentrations in (e) shoots and (f) roots. Three-week-old plants grown in MS medium were treated with nutrient solution containing 1 µM Cs⁺, 1 µM Rb⁺ and 10 mM Na⁺ under low-K⁺ (0.05 mM) conditions for 6 days. Data are means ± SD of three biological replicates. **P < 0.01 (t-test).