2.4.1.249 | Clitoria ternatea gene CtA3'5'GT encoding UDP-glucose:anthocyanin 3',5'-glucosyltransferase is introduced into Chrysanthemum by using binary vector pB249. Although transgenic plants expressing CtA3'5'GT are obtained, their flowers do not show a color change to bluish hue. Two transgenes, namely, CamF3'5'H and CtA3'5'GT, are enough to generate blue chrysanthemums: The 3',5'-diglucosylated delphinidin exhibits a blue color by intermolecular association with flavone glucosides under the weakly acidic pH conditions of general flower petals |