Probable transcriptional regulator that acts as a repressor of the gibberellin (GA) signaling pathway. Probably acts by participating in large multiprotein complexes that represses transcription of GA-inducible genes. Upon GA application, it is degraded by the proteasome, allowing the GA signaling pathway (By similarity). The DELLA motif is required for its GA-induced degradation. Phosphorylated. Ubiquitinated. Upon GA application it is ubiquitinated, leading to its subsequent degradation (By similarity). Belongs to the GRAS family. DELLA subfamily.