RR3 — Asparagus officinalis

Summary

AoRR3 (A4U43_C04F5400) on asparagus chromosome 4 encodes a protein with histidine phosphotransfer kinase activity, phosphorelay response regulator activity, and red/far-red light photoreceptor activity, and belongs to the ARR-like family. The gene is associated with sex determination, antipodal and egg cell differentiation, regulation of cytokinin mediated signalling, upregulation of cell division, stem cell population maintenance, and histidyl-aspartyl phosphorelay. It is 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, aluminum, UV-B light, and osmotic stress. Localisation evidence places the product in the nucleus, plastid, plasmalemma, plasmodesma, and cytosol. Studies of related genes in other species connect the family to cytokinin and red light sensitivity, root development, and stress tolerance.