Figure 7.

RAX Genes Are Required for the Excessive Shoot Branching Caused by EXB1 Overexpression.

(A) Relative expression level of EXB1 in 35S-EXB1-4 rax1 rax2 rax3. EXB1 expression level in 35S-EXB1-4 rax1 rax2 rax3 was more than 2-fold of that in exb1-D.

(B) Shoot branches in 35S-EXB1-4 rax1 rax2 rax3 are obviously fewer than those in exb1-D in a long-day condition. Bar = 1 cm.

(C) Statistical analysis of AMs or branches in each leaf axil of 50-d-old wild type, exb1-D, or 35S-EXB1-4 rax1 rax2 rax3 in a short-day condition. Each column represents one independent plant and each row presents the position of the axils. The typical leaf axil morphologies represented by the different color grids were shown in the right of (C). The white grids represent the absence of AMs, the yellow ones represent the AMs with leaf primordia, the green ones indicate the buds with leaves, and the orange ones indicate branches with flower buds.

(D) to (F) Representative leaf axils of the wild type, exb1-D, or 35S-EXB1-4 rax1 rax2 rax3.

Bars = 100 μm for (C) to (F) except that indicated near the bars.