AHG3 — Brassica oleracea var. botrytis

Summary

BoAHG3 (AHG3, PP2CA) on cauliflower chromosome 5 encodes a protein with PP2C and PPM-type phosphatase-like domains. It is associated with abscisic acid binding, phosphatase activity, and multiple regulatory functions including kinase regulator, ATPase inhibitor, and anion transporter activities. The gene is linked to diverse biological processes such as regulation of membrane potential, water homeostasis, response to carbon dioxide and humidity, potassium ion import, chlorophyll breakdown upregulation, seed germination, and auxin transport. It localises to the tonoplast, vacuole, ER membrane, plastid, and plasmodesmata. Associations with agronomic traits include yield, biomass, leaf number, leaf elongation, tuber size, stem senescence, water use efficiency, stomatal regulation, photosynthetic rate, and responses to water stress, alkali, aluminum, and biotic stress. Studies of related genes in other species link the family to ABA signaling, stomatal closure, and stress tolerance.