Figure 4.

Phenotypes of gamyb Mutants at the Reproductive Stage.

(A) to (D) Longitudinal sections of the shoot apical region at the bract primordium stage of an 85-day-old plant ([A] and [B]) or at the primary rachis branch stage of an 88-day-old plant ([C] and [D]) from wild-type ([A] and [C]) and gamyb-1 ([B] and [D]) plants. Bars = 0.1 mm.

(E) and (F) Wild-type (E) and gamyb-1 (F) plants at heading time. Red arrows indicate panicles of the wild-type plants. At the same time, the mutant plants showed no panicles. Close-up views of the panicles are shown in the insets. Bars = 15 cm.

(G) Panicle structure of wild-type (top) and gamyb-1 (bottom) plants. Bar = 5 cm.

(H) Elongation of the upper five internodes of wild-type (left) and gamyb-1 (right) plants. Bar = 10 cm.