Functions in regulating leaf rolling through abaxial side leaf cell differentiation (PubMed:26873975). May be involved in the transdifferentiation process from mesophyll cells to sclerenchymatous cells (PubMed:26873975). Expressed in root tips, and in the vascular bundles of leaf blades, leaf sheaths, and roots, especially in their sclerenchymatous cells. Inward rolled leaves due to the presence of defective sclerenchymatous cells on the abaxial side of the leaf (PubMed:26873975). Narrow leaves and reduced plant height (PubMed:26873975).