APX3 — Brassica oleracea

Summary

BoAPX3 (BOLC102_C07P066000.1) on cabbage chromosome 7 encodes a haem peroxidase of the Ccp1-like family with L-ascorbate peroxidase activity, also annotated for glycolipid binding, protein kinase activity, and ubiquitin ligase substrate adaptor function. The gene is associated with cellular oxidant detoxification, hydrogen peroxide catabolism, alternative respiration, lipid oxidation, and responses to oxidative stress, cold, freezing, and AOS. It is linked to induced systemic resistance, sucrose transport, autotrophy, regeneration, and protein-chloroplast targeting. Associations with traits include viral disease response, chloroplast development, stomatal opening and closure, abscisic acid sensitivity, flowering time, root morphology, and tolerance to salt, drought, heat, and oxidative stress. The product localises to the peroxisome membrane, chloroplast outer membrane, thylakoid membrane, envelope, stroma, vacuole, and plant-type cell wall. Related genes in other species link the family to plant growth, seedling development, virus resistance, and nitrogen stress adaptation.