Figure 11.

Genetic Framework of Flattened Leaf Blade Formation in Unifacial Leaves.

(A) Model of laminar outgrowth and autonomous differentiation of central-marginal polarity in flattened unifacial leaves. (i) Cylindrical leaf blade as a result of abaxialization. (ii) Leaf blade flattening through DL function. (iii) Differentiation of gradient of central–marginal polarity to follow the flattened leaf shape. (iv) Induction of DL and PRSb expression in the secondary central and marginal domains, respectively.

(B) DL function in monocot bifacial leaves.

Blue arrows indicate the DL function to promote cell proliferation of leaf primordia toward the SAM side. Orange arrows indicate a putative PRSb function to promote marginal growth in flattened unifacial leaves.