RR3 — Asparagus officinalis

Summary

AoRR3 (RR3) on asparagus chromosome 2 encodes a protein with histidine phosphotransfer kinase, phosphorelay response regulator, and red/far-red light photoreceptor activities, placing it in the ARR-like family with a CheY-like receiver domain. The gene is associated with sex determination, antipodal and egg cell differentiation, cytokinin signalling regulation, cell division upregulation, stem cell population maintenance, and the histidyl-aspartyl phosphorelay. It has been linked to traits including biomass yield, photosynthetic ability, photoperiod-sensitive flowering, leaf angle, root phototropism, cadmium concentration, and glyphosate sensitivity. Localisation evidence connects the product to the nucleus, plastid, plasmodesma, and nuclear body. Studies of related genes in other species link the family to cytokinin and red light sensitivity, root development, and stress tolerance.