Root hairs are cylindrical in shape outgrowths of root epidermis. They are characterized by the tip growth which relies on the deposition of new components of cell membrane and cell wall at the tip of the growing hair. The main role of root hairs is to extend the root surface, uptake of water and mineral soils. They are responsible for building interactions with soil microorganisms, and in some species, they synthesize and secrete bioherbicides. The development of root hairs is a complex process that involves many proteins, enzymes and cellular structures.