Figure 5.

Effect of Al supply (5 h) in agarose medium (PVC-block technique) to individual 1-mm apical root segments on the root-elongation rate of seedlings of cv Lixis. Root length was measured at 1-h intervals and root-elongation rates were calculated. Initially (time 0) Al was applied to the 1- to 5-mm apical root segments. The position of the ATS after every 1 to 5 h of treatment is visualized by the hatched areas. The numbers represent mean elongation rates expressed as percent over control for the previous 1-h period. Numbers with asterisks (*) are significantly different (P < 0.05, Tukey test).