NR — Brassica napus

Summary

BnNR (DARMORV10_A07P43060.1) on chromosome A07 of oilseed rape encodes a protein with nitrate reductase (NADPH) activity, NADH:nitrate reductase activity, sulfite oxidase activity, cytochrome-b5 reductase activity, molybdenum cofactor binding, and FAD binding. The gene is associated with regulation of nitrate assimilation, cytokinin anabolism, proline metabolism, S-nitrosylation, and post-embryonic root development. It is linked to numerous traits including nitrogen use efficiency, seed oil content, heterosis, oleic acid content, phosphorus uptake, freezing tolerance, flowering time, stomatal function, disease susceptibility, and responses to cadmium, copper, aluminum, and UV-B stress. The gene also shows associations with cytokinin production, nitric oxide biosynthesis, and root oxidative activity. Studies of related genes in other species link the family to nitrate reduction, stomatal aperture, pathogen resistance, salt stress tolerance, and biomass accumulation.