Pox — Oryza sativa Japonica

Summary

Os12g0112000, designated Pox (also known as PER4, OsPER4, OsPRX52, OsPRX4, PRX4, and PRX52) in rice (Oryza sativa Japonica) on chromosome 12, encodes a haem peroxidase with lactoperoxidase and peroxidase activities, and is classified under EC 1.11.1.7. The gene is associated with diverse biological processes including xylem development, lignin anabolism, activation of syringal lignin anabolism, stomatal movement, response to salt, cellular response to hypoxia, SOS response, chlorophyll fluorescence, and H2O2 catabolic process. It is linked to traits such as grain yield, grain weight, drought tolerance, seedling vigor, starch digestibility, cadmium concentration, photosynthetic rate, transpiration rate, and root length. The encoded protein localizes to the apoplast, plant-type cell wall, vacuole, Golgi, mitochondria, and cytosol. Studies of related genes in other species link the family to lignin composition, salt tolerance, and organ size.