AAO — Cucumis sativus

Summary

CsAAO (CSA_1G604040) on cucumber chromosome 1 encodes a protein with L-ascorbate oxidase activity (EC 1.10.3.3) and p-diphenol:oxygen oxidoreductase activity, and belongs to the cupredoxin and multicopper oxidase families. It is localized to the apoplast, plant-type cell wall, plastid, and plasmodesma. CsAAO is associated with ascorbate metabolism and catabolism, the ascorbate-glutathione cycle, electron transfer, ethylene anabolism, stomatal closure, lignin breakdown, and responses to iron and salinity. It has been linked to photosynthetic rate, stomatal resistance, and drought tolerance. Studies of related genes in other species connect the family to iron content, sodium concentration, plant height, stem diameter, net photosynthetic rate, and salt and oxidative stress responses.