RR3 — Brassica oleracea var. botrytis

Summary

BoRR3, located on chromosome 4 of cauliflower (Brassica oleracea var. botrytis), encodes a response regulator protein of the ARR-like family, possessing histidine phosphotransfer kinase activity, phosphorelay response regulator activity, and histidine kinase binding. This gene is associated with the regulation of cytokinin-mediated signalling, the histidyl-aspartyl phosphorelay, meristem maintenance, multidimensional cell growth, and responses to cytokinin. It has also been linked to antipodal cell and egg cell differentiation, embryo sac development, circadian rhythm, and DNA-templated transcription. Associations with traits include ethylene sensitivity, stomatal opening and closure, and salt tolerance. Phenotypic connections involve cytokinin sensitivity and response, root elongation and hair initiation, shoot and callus formation, fertility, seed size, drought tolerance, and nitric oxide biosynthesis. The protein localises to the plastid, cytosol, cytoplasm, and nucleus.