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. 2021 Aug 1;8:173. doi: 10.1038/s41438-021-00609-9

Fig. 4. Expressions of key genes involved in flavonoids synthesis in different tissues of Malus germplasm resources.

Fig. 4

1, M. hupehensis; 2, M. micromalus; 3, M. halliana; 4, M. baccata; 5, M. domestica ‘Golden Delicious’; 6, M. domestica ‘Fuji’; 7, M. domestica ‘Red Delicious’; 8, M. domestica ‘Gala’; and red flower genotypes: 9, M. ‘Sparkler’; 10, M. ‘Radiant’; 11, M. ‘Adams’; 12, M. ‘Kelsey’; 13, M. ‘Perfect Purple’; 14, M. ‘Royalty’. F3′H, flavonoid 3′-hydroxylase; FLS, flavonol synthase; DFR dihydroflavonol 4-reductase; ANS, anthocyanin synthase. White bars represent white flower genotypes and red bars represent red flower genotypes. The flower petals were collected at stage 1 as described in the materials and methods. Data are presented as mean ± SE (n = 3); “*” and “**” mean significant difference between the white flower and the red flower genotypes at P < 0.05 and P < 0.01, respectively, t-test