Figure 5.
Effect of Al application to the entire root apex on the root surface (distance 20 μm) pH profiles along the primary root of the maize cv ATP-Y (Al-resistant) and cv Lixis (Al-sensitive). Ninety micromolar Almono was supplied in a solution containing KCl and CaCl2 at 200 μm each for 15 (▾), 30 (▪), and 60 (♦) min. ●, Control (−Al) The bulk solution pH was adjusted to 4.5. The values are means of three independent replicates ± sd. The results shown are representative of three independent experiments.