Figure 3.

The dependence of instantaneous Na⁺ currents of Arabidopsis root NSCCs on external NaCl concentration (indicated in mm) (d_p = 22 μm). Inset shows dose-response relation (d_p = 21.5 ± 0.7 μm; n = 5; ±se). G/G_max is the ratio between conductance recorded at tested Na⁺ activities (G) and conductance at 124 mm NaCl (G_max). Conductance values are conductances for inward current immediately negative of the reversal potential. Data were fitted by hyperbolic function (double rectangular, five parameters) by Sigma Plot software. K_1/2 was estimated graphically.