APX4 — Capsicum annuum

Summary

T459_32139 (APX4) on pepper chromosome PGAv.1.6.scaffold588 encodes L-ascorbate peroxidase 3, a haem peroxidase with L-ascorbate peroxidase activity (EC 1.11.1.7). The encoded protein is associated with the ascorbate-glutathione cycle, cellular response to oxidative stress, H₂O₂ catabolism, photoprotection, heat dissipation, and the MAPK cascade. It is linked to carotenoid metabolism and anabolism, abscisic acid anabolism, regulation of hormone levels, cellular respiration, and the pentose-phosphate shunt. The protein localises to the peroxisome membrane, chloroplast thylakoid membrane, chloroplast stroma, and mitochondria. APX4 is associated with leaf dry weight, leaf area index, pungency, leaf water potential, soluble protein content, shoot dry weight, amino acid content, respiration rate, stem diameter, proline content, carotenoid content, net photosynthetic rate, fruit size, sugar content, protein content, photosynthetic rate, root length, chlorophyll content, plant height, photochemical quenching, and salt tolerance.