Fig. 5

Transcription levels of five carotenoid biosynthetic pathway genes in different organs. a, The pictures of different organs were used in this study. b, The relative transcript levels of PSY1, LCYB1, LCYB2, LCYE, CHYB in root, leaf, stem, flower, and four developmental stages of papaya fruit were measured through RT-qPCR. RT-qPCR was performed with gene-specific primer sets in Table 2. Expression data were normalized to the expression of CpActin. Error bars on each column indicate SDs from three replicates