Figure 5.

Four species comparative mRNA in situ hybridization of the inflorescence architecture genes COMPOUND INFLORESCENCE (S) and ANANTHA (AN). Scaled expression values for S and AN are shown in Figure 3, G and H. (A) S is expressed in the tomato TM, late TM (LTM), and SIM, and shows delayed expression in the Spe LTM. Conversely, Spr and Nb have strong expression of S in the TM, with Spr also expressing S in the sympodial shoot meristem (SYM). Earliest expression of S is indicated by a red arrowhead. (B) AN is expressed weakly in the tomato TM and increases in the LTM, reaching peak expression in the FM. Expression in Spe only begins in the LTM and FM/SIM. In contrast, AN is expressed strongly in the TM stages of Spr and Nb. The earliest detected expression is indicated by a red arrowhead. (C) Cartoons of meristem maturation stages depicting expression dynamics and patterns of S and AN across the four species. Black scale bars represent 100 µm.