Figure 1.

Increase in Na⁺ content (micromoles per gram) of excised roots of Arabidopsis after transfer into 200 mm NaCl plus 0.2 mm Ca²⁺ activity labeled with ²²Na⁺. a, Time course for up to 20 min; b, more detailed measures over the first 2 min, fitted with a line y = 3.31x + 0.16, r² = 0.96. Data represent means, and error bars the se (n = 4).