RR1 — Phaseolus vulgaris

Summary

PvRR1 (PHAVU_009G253200) on chromosome 9 of French bean encodes a protein with histidine phosphotransfer kinase activity, phosphorelay response regulator activity, and sequence-specific DNA binding, placing it in the ARR-like family. It is associated with cytokinin signalling and response, including negative regulation of cytokinin-mediated signalling, and with regulation of anthocyanin and phenylpropanoid metabolism, seed size, chlorophyll biosynthesis, root and shoot meristem development, and cell division. The gene is linked to drought tolerance, ABA sensitivity, stomatal closure, photosynthetic efficiency, wax accumulation, and reactive oxygen species accumulation. It localises to the nucleus, cytosol, and plastid. Related genes in other species are linked to cytokinin sensitivity, root growth, lateral root formation, chloroplast development, and anthocyanin accumulation.