Figure 3.

rax1-2 Plants Develop Less Rosette and Cauline Branches and Cannot Initiate or Maintain an AM.

(A) Wild-type (Ws-2) plant early during reproductive development (left) and rax1-2 plant at a similar developmental stage (right).

(B) to (E) Close-ups of the plants shown in (A).

(B) Ws-2 wild-type inflorescence stem showing developing cauline branches.

(C) Inflorescence stem of rax1-2 showing the absence of branches originating from cauline leaf axils.

(D) Ws-2 wild-type rosette with developing rosette paraclade (arrowhead).

(E) Rosette of rax1-2 plant lacking rosette paraclade (arrowhead).

(F) Scanning electron micrograph of a barren rax1-2 cauline leaf axil lacking an organizing center with proliferating cells (arrowhead).

(G) Scanning electron micrograph of barren rosette leaf axil in rax1-2 lacking an organizing center with proliferating cells (arrowhead). Bars = 500 μm in (F) and (G).