May be a general defense protein (By similarity). Required for the formation of the cuticle layer of the cell wall (PubMed:21628525). Ubiquitous in aerial organs (PubMed:12430018, PubMed:21628525). Higher expression levels in young, expanding tissues than in older tissues. Detected in the epidermal layer (PubMed:21628525). Repressed by cycloheximide (CHX) and abscisic acid (ABA). Chemical composition modifications and structural alterations of the cuticular layer of the cell wall leading to increased permeability of the cuticle, increased sensitivity to herbicide (glufosidate), increased cuticular transpiration and increased resistance to Botrytis cinerea. Belongs to the ABC transporter superfamily. ABCG family. PDR (TC 3.A.1.205) subfamily.