POX (TRAESCS4A02G196400) — triticum aestivum

Summary

TaPOX (TRAESCS4A02G196400) on wheat chromosome 4A encodes a haem peroxidase (EC 1.11.1.7) with lactoperoxidase and peroxidase activity, heme binding, and protein phosphorylated amino acid binding. It is a secretory peroxidase localised to the apoplast, plant-type cell wall, vacuole, Golgi, mitochondria, and cytosol. The gene is associated with activation of syringal lignin anabolism, the ascorbate-glutathione cycle, phenylpropanoid metabolism, xylem development, and responses to reactive oxygen species and hydrogen peroxide catabolism. TaPOX has been linked to numerous agronomic traits including drought susceptibility index, canopy temperature, stem and spike length, ear number, spikelet fertility, grain weight, photosynthetic rate, water use efficiency, heat and cold tolerance, flavonoid and starch content, and resistance to Botrytis cinerea. Studies of related genes in other species connect the family to lignin composition, salt tolerance, and organ size.