Figure 1.

The effects of various pharmacological and nutritional treatments, targeting either Shaker-like K⁺ channels and HAK/KUP/KT transporters (A, C, and E) or NSCCs (B, D, and F), on steady-state K⁺ influx in intact roots of barley seedlings grown in full nutrient medium at low (A and B), intermediate (C and D), and high (E and F) [K⁺]_ext and 10 mm [NH₄⁺]_ext. Fluxes are indicated on a root fresh weight basis. Asterisks denote different levels of significance between control and treatment pairs (*0.01 < P < 0.05, **0.001 < P < 0.01, ***P < 0.001; one-way ANOVA with Dunnett’s multiple comparison post hoc test). Each treatment represents the mean of four to 69 replicates. Error bars indicate se.