What function the cuticle has in plants

A plant cuticle is a protecting film covering the epidermis of leaves, young shoots and other aerial plant organs without periderm. It consists of lipid and hydrocarbon polymers impregnated with wax, and is synthesized exclusively by the epidermal cells.

Notwithstanding its capacity as a porousness hindrance for water and different particles (counteract water misfortune), the small scale and nano-structure of the fingernail skin give particular surface properties that avoid sullying of plant tissues with outer water, earth and microorganisms.