The present invention provides a polynucleotide having a function of regulating a content of a plant metabolite, a polypeptide having a function of regulating a content of a plant metabolite, a vector containing the polynucleotide or a part of the polynucleotide, and a transformed plant produced by using the vector, and a method for producing the transformed plant, and according to the above polynucleotide, polypeptide, vector, transformed plant and method, a novel gene regulating a content of a plant metabolite and use of the novel gene.
