Figure 5.

Effect of K⁺ and Ca²⁺ channel blockers (TEA-Cl and verapamil, respectively) on the FC-induced growth rate (μm s⁻¹ cm⁻¹) of maize coleoptile segments. Coleoptile segments were first preincubated for over 1 h in a control medium, whereupon channel blockers were added. At 2 h, FC was added to the incubation medium, at a final concentration of 1 µM. Inset on the right shows the total elongation growth, presented in a bar graph, calculated as the sum of extensions between 120 and 600 min of the experiment. Values are the mean of at least nine independent experiments. Bars indicate mean ± SE. Mean values followed by the same letter are not significantly different from each other according to the LSD test (P < 0.05).