RR1 — Asparagus officinalis

Summary

A4U43_C09F3570 (AoRR3) on asparagus chromosome 9 encodes a protein with histidine phosphotransfer kinase, phosphorelay response regulator, and red/far-red light photoreceptor activities, placing it in the ARR-like family. The gene is associated with sex determination, antipodal and egg cell differentiation, cytokinin signalling regulation, cell division upregulation, adventitious root development, stem cell population maintenance, and the histidyl-aspartyl phosphorelay. It is linked to numerous traits including biomass yield, photosynthetic ability, photoperiod-sensitive flowering, leaf angle, root phototropism, cadmium concentration, nitrate sensitivity, and yield. Localisation evidence connects the product to the nucleus, plastid, plasmalemma, plasmodesma, and cytosol. Related genes in other species link the family to cytokinin signalling, red light sensitivity, root development, shoot regeneration, and stress tolerance.