PRR2 — Capsicum annuum

Summary

T459_00809 (PRR2) in pepper (Capsicum annuum) chromosome 1 encodes a response regulatory domain-containing protein with phosphorelay response regulator activity and sequence-specific DNA binding, placing it in the GLK1/2-like family of transcription factors. The gene is associated with pigment accumulation, including carotenoid and chlorophyll anabolism, and with fruit color and development. It has been linked to circadian rhythm, cytokinin signaling, stomatal closure, and responses to bacteria, salinity, and osmotic stress. Associations with agronomic traits include carotenoid content, fruit coloration, salt tolerance, disease resistance, and defense against pathogens such as Pseudomonas syringae. The gene is also linked to brassinosteroid sensitivity, abscisic acid sensitivity, root thickness, and hypocotyl morphology. Studies of related genes in other species link the family to calcium ion homeostasis and hypocotyl elongation, and to rind color and spotted rind.