Figure 5.

Overexpression of ZPR Proteins Causes Leaves to Develop Abaxialized Characters.

(A) ZPR3-overexpressing plant showing meristem termination phenotype.

(B) Abaxialized trumpet-shaped leaf from ZPR3-overexpressing plant.

(C) Leaf from ZPR3-overexpressing plant showing downward curling.

(D) Leaf from ZPR1-overexpressing plant viewed from below showing downward curling. White line points to curled under margin.

(E) Wild-type leaf showing nearly flat blade.

(F) Leaf from ZPR3-overexpressing plant with roughened surface and ridges along midrib. White line points to ridge.

(G) Section of cleared wild-type leaf blade showing vein pattern.

(H) Section of cleared leaf from ZPR3-overexpressing plant showing dense pattern of veins.

(I) Close-up of (G).

(J) Close-up of (H). Note proliferation of cells around veins.

(K) Section through wild-type petiole. Note that xylem is located adaxially, above the phloem.

(L) Section through petiole from ZPR3-overexpressing plant. Xylem is nearly surrounded by phloem. x, xylem; p, phloem.