Figure 7.

YDA Is Upstream of MKK4/MKK5-MPK3/MPK6 in Regulating Inflorescence Architecture.

(A) Inflorescence stem apices of Col-0, DD, yda, and DD yda plants illustrating the extremely clustered inflorescence of yda and the partial rescue of this mutant phenotype in DD yda plants. Bar = 0.5 cm.

(B) Mature siliques and attached pedicels of Col-0, DD, ΔN-YDA, yda, and DD yda plants, showing the very long pedicel of the ΔN-YDA plant, the extremely short pedicel of the yda mutant, and the partially rescued pedicel of the DD yda plant. Bar = 1 cm.

(C) Lengths of mature pedicels on the main stem of ∼7-week-old plants (n = 30 to 40 pedicels per genotype). Bars represent average values + sd. Asterisks above the columns indicate significant differences compared with Col-0 or in the marked comparison (P < 0.0001, Student’s t test).

[See online article for color version of this figure.]