B29 — Cucumis sativus

Summary

CSA_5G383850 (B29, also known as NR2, NIA2, or CsNIA2) on cucumber chromosome 5 encodes a protein with nitrate reductase (NADPH) activity, cytochrome-b5 reductase activity, sulfite oxidase activity, and cytokinin riboside 5'-monophosphate phosphoribohydrolase activity, and binds FAD, molybdenum cofactor, and heme. This gene is associated with nitrate assimilation and metabolism, nitric oxide metabolism, nitrogen fixation, regulation of nitrate assimilation, and nitrogen use efficiency. It is linked to traits including nitrate content, nitrogen content, leaf chlorophyll content, shoot dry weight, root volume, seed protein content, carbohydrate content, oleic acid content, whole plant size, and relative growth rate. Associations also include flowering time, freezing tolerance, stomatal function, disease susceptibility, and responses to aluminum, cadmium, and copper toxicity. Studies of related genes in other species link the family to biomass accumulation, nitrate reduction, nitric oxide generation, and salt stress resistance.