RR3 — Asparagus officinalis

Summary

AoRR3 (RR3) on asparagus chromosome 10 encodes a histidine phosphotransfer kinase and phosphorelay response regulator with red/far-red light photoreceptor activity, belonging to the ARR-like family. The gene is associated with sex determination, antipodal and egg cell differentiation, stem cell population maintenance, and regulation of cytokinin-mediated signalling. It has been linked to numerous agronomic traits including biomass yield, photosynthetic ability, photoperiod-sensitive flowering time, leaf angle and curling, shoot axis branching, stamen length, yield, and responses to glyphosate, nitrate, cadmium, aluminum, UV-B light, and osmotic stress. Localisation evidence places the product in the nucleus, cytoplasm, plastid, plasmalemma, and plasmodesmata. Related genes in other species are associated with cytokinin signalling, red light sensitivity, root development, and stress tolerance.