Small GTPases are monomeric guanine nucleotide binding proteins coupled to the α-subunit of heterotrimeric G proteins.All small GTPases belong to Ras superfamily.Plant small GTPases superfamily,especial ROP family,exerted important function as ‘molecular switch' in plant growth,development and signal transduction,including regulation of pollen growth,root hair development,phytohormone signaling,and so on.In order to reveal multiple functions of plant small GTPases,the members of this superfamily and their ...