Fig. 2.

The expression levels of genes involved in anthocyanin biosynthesis in the petal of two P. grandiflorus varieties. The expression levels of genes from the white petals were compared with those of the purple petals. The data are representative of three independent experiments (mean ± SE). *p < 0.05, **p < 0.01, and ***p < 0.001 as compared with those of the purple petals. CHS, chalcone synthase; CHI, chalcone isomerase; F3H, flavanone hydroxylase; DFR, dihydroflavanol-4-reductase; ANS, anthocyanin synthase; UFGT, flavonoid-3-O-glucosyltransferase