AO1 — Oryza sativa Indica Group

Summary

BGIOSGA025978 (AO1, OiAO1) on chromosome 7 of Indica rice encodes a copper amine oxidase with diamine oxidase, putrescine oxidase, aliphatic amine oxidase and primary methylamine oxidase activities, and also exhibits hormone activity. The protein contains copper-binding and quinone-binding domains and localises to the apoplast, plant-type cell wall, extracellular region and nucleus. AO1 is associated with putrescine breakdown, arginine homeostasis, auxin metabolism, nitric oxide and nicotine anabolism, the shikimate pathway, ascorbate-glutathione cycle, secondary cell wall biogenesis, protoxylem development, regulation of programmed cell death and root development, and responses to jasmonic acid and salicylate. It is linked to photosynthetic rate and chlorophyll content. Studies of related genes in other species connect the family to grain yield, drought and salinity tolerance, root morphology, carotenoid content, and insect damage.