Chalcone synthease (CHS) and chalcone isomerase (CHI) arealso involved in biosynthesis of flavonoids. Expression of the genesincreased rapidly after 30 DAFB and reached a peak around 44 DAFB(14 days after treatment). CA treatment did not alter the generaltendency, but the peaks in the CA treatment appeared on the 7thday after CA application (37 DAFB) (Fig. 8). The expressions of CHSand CHI in the CA treatments were 13% and 9% higher than that ofthe control, respectively