POX — Sorghum bicolor

Summary

SORBI_3005G011200 (SbPOX) on sorghum chromosome 5 encodes a secretory haem peroxidase with lactoperoxidase and peroxidase activity (EC 1.11.1.7). The gene is associated with xylem development, activation of syringal lignin anabolism, lignin anabolism, hydrogen peroxide catabolism, response to oxidative stress, defense response, brassinosteroid-mediated signalling, cellular response to hypoxia, and homeostasis. The encoded protein localises to the apoplast, plant-type cell wall, vacuole, Golgi, mitochondria, cytosol, and cytoplasm. SbPOX is linked to grain yield, chlorophyll content, photosynthetic rate, transpiration rate, stomatal resistance, root length, seedling growth, carbohydrate content, proline content, nitrate uptake, leaf composition, organ identity, and ethylene sensitivity. It is also connected to resistance to Botrytis cinerea, disease resistance, photoperiod stress response, cell proliferation, leaf development, and nitrate assimilation. Studies of related genes in other species link the family to lignin composition, lignin biosynthesis, salt tolerance, and organ size.