Figure 4.

Temporal and Spatial Expression Pattern of WOX4 in the Shoot Apex and Developing Leaf.

(A) and (C) Longitudinal section of the shoot apex of a seedling grown in soil for 14 d.

(B) Longitudinal section of the shoot apex of a control seedling grown in MS medium without DEX 7 d after germination.

(D) and (E) Longitudinal (D) and transverse (E) section of an axillary bud.

(F) to (I) Transverse section of the shoot apex with leaf primordia and developing young leaves. Arrowheads in (H) indicate putative procambium. P2 primordium is outlined in (F) and (G).

(J) to (M) Close-up view of vascular bundles in developing young leaves.

(N) Longitudinal section of a young inflorescence.

(O) Longitudinal section of a developing flower.

(A), (B), (D) to (F), (H), (J), (K), and (M) to (O) Antisense probe of WOX4.

(C), (G), (I), and (L) Sense probe of WOX4.

AM, axillary meristem; BM, branch meristem; FM, floral meristem; IM, Inflorescence meristem; lv, large vascular bundle; le, lemma; ph, phloem; P1 to P5, plastochrons 1 to 5; sl, sterile lemma; sv, small vascular bundle; xy, xylem. Bars = 50 µm in (A) to (E) and (J) to (O) and 100 µm in (F) to (I).