AO — Solanum lycopersicum

Summary

SlAO (SOLYC04G054690.3) on tomato chromosome 4 encodes a protein with L-ascorbate oxidase and multicopper oxidase domains, including cupredoxin. The enzyme is annotated with L-ascorbate oxidase activity, p-diphenol:oxygen oxidoreductase activity, copper binding, and redox activity. SlAO is associated with ascorbate metabolism, including catabolism and biosynthesis, as well as the ascorbate-glutathione cycle, xanthophyll cycle, NAD metabolism, and regulation of photosynthesis. It is linked to the apoplast, plasmodesmata, and extracellular regions. Associations with agronomically relevant traits include drought tolerance, chlorophyll content, quantum yield, photochemical quenching, specific leaf area, shoot fresh and dry weight, root length, leaf number, sugar and flavonoid content, proline content, stomatal resistance, respiration rate, and salt tolerance. Related genes in other species are linked to iron content, leaf color, oxidative stress response, and spider mite susceptibility.