Figure 1.

Morphospace for the transient model. Different phenotypes are generated by varying the times T_A and T_B at which flowers begin to form. Values along each axis range from 0 to 10 plastochrons. Black arrows, pointing away from the wild-type architecture of Arabidopsis, indicate the effect of terminal flower 1 (tfl1) and leafy (lfy) mutations (under inductive conditions). Inflorescences are shown at six plastochrons; a plastochron is a time interval during which a meristem may either switch to floral identity or continue to produce further meristems. From Prusinkiewicz et al. (2007). Reprinted with permission from AAAS.