NR — Brassica juncea

Summary

BJUB03G12040S (BjNR) on chromosome B03 of Indian mustard encodes a protein with nitrate reductase (NADPH) activity, NADH:nitrate reductase activity, cytochrome-b5 reductase activity acting on NAD(P)H, sulfite oxidase activity, and cytokinin riboside 5'-monophosphate phosphoribohydrolase activity, along with molybdenum cofactor and FAD binding. The gene is associated with regulation of nitrate assimilation, cytokinin anabolism, nitric oxide anabolism, and downregulation of systemic acquired resistance. It has been linked to numerous agronomic traits including nitrogen use efficiency, seed oil content, water use efficiency, freezing tolerance, flowering time, root development, stomatal function, and responses to pathogens, herbivores, heavy metals, and osmotic stress. Studies of related genes in other species connect the family to nitrate reduction, nitric oxide generation, lateral root development, gravitropic response, virus resistance, and biomass accumulation.