AO1 — Oryza sativa Indica Group

Summary

BGIOSGA022844 (symbol AO1, also known as OiAO1) on chromosome 6 of indica rice encodes a copper amine oxidase, a protein with Cu_amine_oxidase domains that exhibits diamine oxidase, putrescine oxidase, aliphatic amine oxidase and primary methylamine oxidase activities. The gene is associated with putrescine breakdown, arginine homeostasis, amine metabolism, auxin metabolism, nitric oxide anabolism, the ascorbate-glutathione cycle, and the shikimate pathway. It is linked to protoxylem development, secondary cell wall biogenesis, regulation of programmed cell death and root development, and responses to putrescine, salicylate and jasmonic acid. The encoded protein localises to the apoplast, plant-type cell wall, nucleus and extracellular region. Associations with photosynthetic rate and chlorophyll content have also been noted. Studies of related genes in other species link the family to yield, test weight, drought and salinity tolerance, root morphology, and carotenoid content.