Figure 3.

Aberrant Adaxial/Abaxial Polarity in ae3-1 Leaves.

(A) A wild-type rosette leaf.

(B) to (D) ae3-1 rosette leaves.

(B) An abaxial view showing a narrow leaf with a thickened midrib (arrowheads).

(C) An adaxial view showing a very narrow leaf with only minimum adaxial/abaxial differentiation.

(D) A radial symmetric needle-like leaf.

(E) A cauline leaf that bears an ectopic leaf.

(F) to (J) Transverse sections. Sections from (F) to (J) are corresponding to the individual leaves from (A) to (E), respectively, with the approximate section regions indicated by the white lines. They are from a wild-type rosette leaf (F), narrow (G) and very narrow (H) ae3-1 rosette leaves, a needle-like rosette leaf (I), and a cauline leaf bearing an ectopic leaf (J). Arrowheads in (F) to (H) indicate phloem, and arrows in (I) and (J) point to vascular bundles.

(K) to (S) Epidermal patterns of leaves.

(K) Adaxial epidermis of wild-type Ler.

(L) Abaxial epidermis of Ler.

(M) to (O) Close-ups of leaf epidermis in (C), corresponding to the boxed regions indicated by m, n, and o, respectively.

(P) Close-up of epidermis of a boxed region in (D).

(Q) to (S) Close-ups of epidermis in (E), corresponding to the boxed regions indicated by q, r, and s, respectively.

Bars = 500 μm in (A) to (E) and 50 μm in (F) to (S).