Fig. 3.

Al³⁺ tolerance of transgenic and control lines in hydroponic experiments. (A) Net root growth of transgenic and control seedlings was measured after 4 d in nutrient solution containing 0, 1, 2 or 4 μM AlCl₃. Data are mean and standard error (n=7). (B) Relative root growth of lines was calculated as net root growth in Al³⁺ compared to zero Al³⁺ control. Data are means and standard error. Asterisks indicate significant differences from the null lines at the same Al³⁺ concentration (P<0.05).