GA promotes plant growth via 26S proteasome-dependent proteolysis of DELLA proteins repressors, one of the key component in GA signaling, and also depends on GA-mediated interaction between GA receptor and DELLA proteins.

• GA信号转导通道的研究进展,特别是DELLA蛋白阻遏植物生长发育的分子机理和GA解除阻遏作用(derepress)的分子模型; GA受体研究的新进展;