Figure 3.

Effect of a range of Al concentrations (0, 20, 50, and 100 μm) and treatment durations (3, 6, 12, and 24 h) on the H⁺-ATPase activity (A) and zeta potential (B) of PM vesicles isolated from whole-root fractions of squash. The plants were grown in HS (1/5) adjusted to pH 4.5 for 5 d from germination. Al treatments were performed in the same solution without P and the plants were cultured in −P solution for at least 12 h prior to treatments. Values are mean ± se of three replicates and representative of two independent experiments. Al was absent in the electrophoresis medium.