The developing mucilage pockets. All three TBAs could be detected in the mucilage pockets by 8 DPA (Fig. 8). By 10 DPA, the cYFP signal was absent from the mucilage pocket but was observed in the developing columella (Fig. 8). This expression pattern coincides spatiotemporally with the TBA transcript and promoter activity patterns (Figs. 5 and 6) and reinforces the characterization of TBA proteins