Figure 4.

Salt stress impairs K nutrition in Arabidopsis. With increased concentration of NaCl in the culture medium, Na⁺ content in plants increases whereas K content decreases. Arabidopsis seedlings (ecotype Columbia) growing in half strength of the MS solution (pH 5.3) for two weeks were treated with NaCl by adding NaCl into the culture solution to the indicated final salt concentrations. Seedlings were allowed to grow for 3 days before harvesting and analyzing ion contents (dry weight basis). Data are means ± SE (n=3).