EXB1 — Brassica oleracea

Summary

BoEXB1 (BOLC102_C07P018270.1) on cabbage chromosome 7 encodes a WRKY transcription factor containing the conserved WRKY DNA-binding domain. The protein localises to the nucleus and exhibits sequence-specific DNA binding, transcription factor activity, protein homodimerisation and metal binding. BoEXB1 is associated with hormone metabolism, particularly gibberellin and abscisic acid signalling, as well as pigmentation, anthocyanin biosynthesis, phenylpropanoid metabolism, photorespiration, cell morphogenesis and growth. It is linked to positive regulation of leaf senescence, systemic acquired resistance, defence responses to bacterial molecules and chitin, and both downregulation of gibberellic acid and abscisic acid mediated signalling. The gene is also associated with drought tolerance, salt tolerance, oxidative stress response, flowering time and hybrid incompatibility. Related genes in other species are linked to shoot branching, leaf senescence, flowering time and abiotic stress responses.