GAI (AT1G14920) — Arabidopsis thaliana

Summary

AT1G14920, known as GAI (GIBBERELLIC ACID INSENSITIVE) or RGA2, encodes a protein with DELLA and GRAS domains in Arabidopsis thaliana. The protein is associated with gibberellin binding, E-box binding, transcription corepressor binding, phytochrome binding, and SUMO-related enzymatic activities. GAI is linked to downregulation of leaf development and vegetative growth, regulation of shade avoidance, and inhibition of trichome spacing. It is associated with traits including seed volume, seed shattering, germination ratio, drought recovery, leaf length-to-width ratio, tiller angle, flower number, panicle number, and phosphorus and sodium content. The protein localizes to the nucleus, plastid, plasmodesma, and SCF complex, and is linked to pathways involving GA-GID1 complex transport and IDD-like-regulated transcription. Related genes in other species link the family to plant height, grain yield, fruit ripening, and drought tolerance.