POX — Solanum tuberosum

Summary

PGSC0003DMG400022342, symbol POX (also known as StPERX or PERX) on potato chromosome 2, encodes a secretory haem peroxidase with lactoperoxidase and peroxidase activity, classified as EC 1.11.1.7. The product binds heme and metal ions and is localised to the plant-type cell wall and extracellular space. POX is associated with regulation of kinase activity, cell wall organisation or biogenesis, anthocyanin breakdown, NADPH regeneration, and carbohydrate utilisation. It has been connected to numerous agronomic traits including drought recovery, drought sensitivity, leaf relative water content, leaf chlorophyll content, plant fresh weight, root volume, root dry weight, shoot dry weight, stem length, ear length, fruit firmness, flavonoid content, proline content, and potassium concentration. Studies of related genes in other species link the family to relative chlorophyll content.