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. 2015 Apr 27;6:261. doi: 10.3389/fpls.2015.00261

FIGURE 1.

FIGURE 1

Petal color change and transverse sections in the open process of Ipomoea tricolor (Yoshida et al., 2009). (A) Whole flower growth. The right photos are half-cut buds; (B) Transverse sections of petals.