Figure 8.

A Simplified Model for the Crosstalk between GA and JA.

(A) Both DELLAs and JAZs interact with and attenuate WD-repeat/bHLH/MYB complex to inactivate downstream genes and repress trichome formation. GA and JA signal induce degradation of DELLAs and JAZs, respectively, to derepress WD-repeat/bHLH/MYB complex and synergistically and mutually dependently modulate trichome development in Arabidopsis.

(B) A previous study showed that the Arabidopsis DELLAs interact with and repress JAZs to release MYC2 that mediates JA-regulated root growth (Hou et al., 2010).

(C) A previous study showed that JAZs interact with and repress DELLAs to release PIF3 that regulates GA-mediated hypocotyl elongation in Arabidopsis (Yang et al., 2012).

[See online article for color version of this figure.]