Figure 1.

Effect of salinity (50 mm NaCl) on net K⁺ fluxes measured from Arabidopsis (wild-type Columbia; A) root mature epidermis and leaf mesophyll tissue (B) at various bathing [Ca²⁺]. Data are mean ± se (n = 7). For all MIFE data, the sign convention is “influx positive.” Ionic concentration of the bath was as follows (in mm): 0.2 K⁺, 2 MES/4 Tris, pH 5.8 (adjusted with HCl), plus a required concentration of Ca²⁺.