RGA — Brassica oleracea

Summary

BoRGA (BOLC102_C09P031720.1_BOLC102_V1) on cabbage chromosome 9 encodes a DELLA protein, a member of the GRAS transcription factor family, with domains including DELLA_N_sf and TF_GRAS. The product is associated with gibberellin and phytochrome binding, transcriptional co-regulator activity, and blue light photoreceptor activity. BoRGA is linked to regulation of gibberellic acid-mediated signalling, shade avoidance, trichome morphogenesis and spacing, inflorescence meristem growth, floral organ morphogenesis, and singlet oxygen-mediated programmed cell death. It localises to the nucleus, plastid, plasmodesma, and complexes such as SCF and SWI-SNF. The gene has been connected to traits including flower number, fruit set and quality, leaf area, trichome density, root width, copper sensitivity, total soluble sugar and flavonoid content, and shoot elongation under submergence. Studies of related genes in other species link the DELLA family to drought tolerance, heat tolerance, seed number, fruit length, and clubroot resistance.