Figure 7.

Model of the roles of AtBMI1-PRC1 and EMF1-PRC1 variants in regulating juvenile-to-adult phase transition through miR156 and miR172 repression. EMF1-PRC1 represses MIR172 and SPLs to maintain the juvenile phase. As the plant ages, the levels of miR156 decrease by AtBMI1-PRC1-mediated repression, which allows the development of adult traits and the acquisition of flowering competence. Solid purple lines with bars indicate negative regulation; solid red lines with arrows indicate positive regulation; orange lines with bars indicate EMF1-PRC1/PRC2 repression; pink lines with bars indicate AtBMI1-PRC1/PRC2 repression (the dashed pink line indicates a possible negative regulation); and the dotted black line with arrow indicates the movement of FT from leaves to the SAM. Repressed genes are indicated in light blue italic type and activated genes in dark blue italic type; proteins and miRNAs are indicated in black type. FUL, FRUITFULL.