Aquaporins are integral membrane proteins that form pores to facilitate the transport of water and other small molecules between cells. They are essential for rapid water movement in plant tissues and tolerance to drought and salt stresses. Aquaporins have a structure of six transmembrane alpha-helices and selectively conduct water while preventing the passage of ions. Their presence increases membrane permeability to water and is important for plant growth, transpiration, and metabolism through differentiation of meristem tissue and primary and secondary growth.