APX — Solanum tuberosum

Summary

PGSC0003DMG400030056 (APX) on potato chromosome 6 encodes a haem peroxidase with L-ascorbate peroxidase activity (EC 1.11.1.7), placing it in the Ccp1-like peroxidase family. The gene is associated with cellular response to oxidative stress, glutathione metabolism, and proline metabolism, and its product localises to the peroxisome membrane, chloroplast thylakoid membrane, and stress granules. APX is associated with traits including plant fresh weight, root dry weight, leaf relative water content, net photosynthetic rate, starch content, bacterial blight disease resistance, aphid response, and viral disease response. It is also linked to phenotypes such as drought and heat stress tolerance, waterlogging tolerance, oxidative stress resistance, photoprotection, and hydrogen peroxide removal. Studies of related genes in other species link the family to salt tolerance, heat tolerance, root development, and resistance to fungal pathogens.