FIGURE 2.

Model of the different regulatory pathways regulating GNC and GNL transcription in A. thaliana. phyB, phytochrome B; PIF, PHYTOCHROME INTERACTING FACTOR; GA, gibberellin; GID1, GIBBERELLIN INSENSITIVE DWARF1; SCF, SKP1-CULLIN-F-BOX protein type E3 ubiquitin ligase with the F-box protein SLY1 (SLEEPY1; SCF^{SLY 1}) or TIR1 (TRANSPORT INHIBITOR RESISTANT1, SCF^TIR1); ARF, AUXIN RESPONSE FACTOR; SLR1, SOLITARY ROOT1 (AUX/IAA protein); CK, cytokinin; ARR, ARABIDOPSIS RESPONSE REGULATOR. Continuous lines indicate direct and experimentally validated regulation; dashed lines indicate indirect regulation; question marks indicate proposed regulatory modes of action.