RR3 — Asparagus officinalis

Summary

AoRR3 (A4U43_C07F5600) on asparagus chromosome 7 encodes a protein with histidine phosphotransfer kinase, phosphorelay response regulator, and red/far-red light photoreceptor activities, placing it in the ARR-like family of two-component signaling elements. The gene is associated with sex determination, antipodal and egg cell differentiation, stem cell population maintenance, regulation of cytokinin-mediated signaling, and the histidyl-aspartyl phosphorelay. It is linked to traits including biomass yield, photosynthetic ability, photoperiod-sensitive flowering time, leaf angle, leaf curling, root phototropism, cadmium concentration, aluminum response, nitrate sensitivity, and biotic plant stress. Localization evidence connects the product to the nucleus, plastid, plasmodesma, and nuclear body. Related genes in other species link the family to cytokinin signaling, red light sensitivity, root development, shoot regeneration, and responses to salinity, pathogens, and nematodes.