The effects of various pharmacological and nutritional treatments on steady-state K+ influx in intact roots of Arabidopsis Col-0 wild type (A), WS wild type (B), atakt1 (C), athak5 (D), and athak5 atakt1 (E) grown in full nutrient medium at low [K+]ext and 2 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 three to 14 replicates. Error bars indicate se.