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Figure 2. Flower and seed phenotypes of Ipomoea species. (A–G) Ipomoea nil lines. (A) TKS (wild-type), (B) AK19 (CHS-D mutant), (C) AK40 (CHI mutant), (D) AK10 (DFR-B mutant), (E) AK23 (ANS mutant), (F) NS/W1ca1 (InWDR1 mutant), and (G) Q0306 (brown mutant). (H) Seed pigmentation and trichome formation in NS/W1ca1 (left) and Q0306 (right). The photograph was taken using a digital microscope (VHX-100, Keyence, Osaka, Japan), and the scale bar represents 1 mm. (I) SEM image of seed trichome in Q0306; the scale bar represents 200 µm. (J–L) Phenotypes of I. purpurea lines. (J) FP39 (wild-type), (K) PR640 (CHS-D mutant), and (L) YJH/DR-4 (bHLH2 mutant). (M) Wild-type I. quamoclit line, Q0055.