Figure 5.

Auxin responses in monopteros mutants. Genotypes: wild type (black), auxin-resistant 1-12 (gray), and monopteros ^G33 (white, mpG12 in A and B, mpG33 in C). A and B, Quantification of cotyledon area of seedlings grown for 10 d in the presence of 0 and 1 μm IAA (A) and in the presence of 0 and 1 μm 2,4-D (B). Size bars indicate se. Significance of genotype-dependent differences relative to wt type values as determined by Student t test analysis is indicated by asterisks (*, 0.01 ≤ P < 0.05; **, 0.001 ≤ P < 0.01; and ***, P < 0.001). Sample sizes of 10 to 50 cotyledons. C, Adventitious root formation in cotyledons exposed to 0.3 mg L⁻¹ indole-butyric acid (IBA). Sample sizes of 222 to 475 cotyledons.