PRX74 — Brachypodium distachyon

Summary

BdPRX75 (PRX74) on Brachypodium distachyon chromosome 2 encodes a secretory class III peroxidase (EC 1.11.1.7) with lactoperoxidase and peroxidase activity, heme and calcium ion binding, and metal binding. This enzyme is associated with wound healing, cell maturation, cell wall modification, stomatal closure, chlorophyll fluorescence, and hydrogen peroxide catabolism. It is linked to regulation of lignin anabolism, auxin, gibberellin, and ethylene biosynthesis, as well as response to herbicide, detoxification, and oxidative stress response. Trait associations include leaf dry weight, leaf width and length, biomass yield, plant height, lignin and sugar content, transpiration rate, water use efficiency, photosynthetic rate, stomatal resistance, drought and heat tolerance, stripe rust resistance, and salt tolerance. The protein localizes to the vacuole, plant-type cell wall, and extracellular space. Studies of related genes in other species link the family to similar stress and developmental processes.