Transcript analysis of RZS1 and BAS expression in transgenic tobacco (T2generation). (A) Expression construct of RZS1 and BAS used in this study. (B) The expression levels of RiRZS1 in RZS1-BAS overexpressing transgenic tobacco leaves. (C) The expression levels of RpBAS in RZS1-BAS-overexpressing transgenic tobacco leaves. Expression levels were examined using quantitative RT-PCR and normalized to those of the internal reference gene Elongation Factor 1 alpha (EF1a). Significant differences were identified using one way ANOVA with Fisher's least significance differences test (P < 0.05). N.D., not detected. pro35 S, CaMV35S promoter; AtADH 5′-UTR, five prime untranslated region of A. thaliana alcohol dehydrogenase; RiRZS1, Rubus idaeus raspberry ketone/zingerone synthase 1; RpBAS, Rheum palmatum benzalacetone synthase; terHSP, terminator of A. thaliana heat shock protein.