Figure 16.

The DELLA Motif Is Essential GA-Induced Proteolysis of DELLA Proteins.

(A) GA induces proteolysis of GFP-RGA, but not GFP-(rga-Δ17) that lacks the DELLA motif. Nuclear fluorescence in root tips was visualized by confocal loser microscopy under an identical setting for all images. Reproduced with modifications from Dill et al. (2001).

(B) SLY1 and GID1 Are Required for GA-Induced Degradation of RGA. The protein blot contains proteins extracted from WT and mutant seedlings that were treated with water (−) or GA (+). The blot was probed with anti-RGA antibodies. Reproduced from Griffiths et al. (2006).