APX — Cucumis melo

Summary

MELO3C025724.2 (CmAPX) on melon chromosome 12 encodes a haem peroxidase with L-ascorbate peroxidase activity, also annotated with p-coumarate 3-hydroxylase, kinase, and siRNA/miRNA binding activities. The gene is associated with cellular response to oxidative stress, flavonoid and auxin metabolism, cell cycle G2/M phase transition, positive regulation of stomatal complex development, and pattern specification. It is linked to peroxisome membrane, chloroplast thylakoid membrane, and stress granule localisation. Associations include leaf and root dry weight, bacterial blight disease resistance, viral response, aphid response, net photosynthetic rate, days to flowering, ethylene sensitivity, sugar and flavonoid content, and stomatal resistance. Phenotype associations include excess light stress tolerance, heat stress memory, thermotolerance, water-use efficiency, drought tolerance, pathogen defense, and hydrogen peroxide removal. Related genes in other species link the family to oxidative stress tolerance, salt and heat tolerance, root development, and resistance to fungal and viral pathogens.