Figure 8.

Inhibition of root elongation by IXB is partially reduced in atprx71 mutants. Wild-type (WT), atprx71-1, and atprx71-2 seedlings grown for 5 d on solid medium were transferred to solid medium containing the indicated doses of IXB. Primary root elongation was measured after 3 d. Bars indicate average elongation ± se (n > 12). Asterisks indicate significant differences between the wild type and mutants according to Student’s t test. This experiment was repeated twice with similar results. *, P < 0.05; ***, P < 0.01.