AO1 — Oryza sativa Indica Group

Summary

BGIOSGA022845 (symbol AO1, also known as DAO1) on indica rice chromosome 6 encodes a copper amine oxidase with 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, and the ascorbate glutathione cycle. It is linked to protoxylem development, secondary cell wall biogenesis, regulation of programmed cell death and root development, and responses to jasmonic acid and salicylate. The product localises to the apoplast, plant-type cell wall, extracellular region and nucleus. Associations with photosynthetic rate and chlorophyll content have been noted. Studies of related genes in other species connect the family to grain yield, drought and salinity tolerance, root morphology, and carotenoid and protein content.