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). Its mRNA transcript may be transported over long distance in the phloem stream. Such trafficking may regulate leaf development. Belongs to the GRAS family. DELLA subfamily.