RGL3 — Arabidopsis thaliana

Summary

AT5G17490 (RGL3) in Arabidopsis thaliana encodes a DELLA protein, a member of the GRAS transcription factor family characterized by the DELLA_N domain. The product exhibits gibberellin binding, E-box binding, and transcription corepressor binding activities, and is associated with regulation of gibberellic acid-mediated signalling, response to karrikin, and detection of light. RGL3 is linked to diverse traits including leaf length-to-width ratio, tiller angle, seed volume, flower number, root width, copper sensitivity, and far-red light sensitivity. It has been connected to processes such as fruit septum development, plant epidermis development, trichome morphogenesis, and singlet oxygen-mediated programmed cell death. The protein localizes to the nucleus, plastid, and plasmodesma, and participates in pathways involving JAZ/MYC and BZR/BES transcription factors. Studies of related genes in other species link the family to plant height, grain yield, fruit ripening, and drought tolerance.