B29 — Solanum tuberosum

Summary

PGSC0003DMG400030212 (symbol B29, also known as StNIA2-1, StGNR1, StNIA2, StNIA1, GNR1, NIA2, StCHL3, STNR6, StNR3, StNR2, StNR1) on potato chromosome 11 encodes a nitrate reductase (NADPH) (EC 1.7.1.1) with additional cytochrome-b5 reductase, sulfite oxidase, and cytokinin riboside 5'-monophosphate phosphoribohydrolase activities, along with molybdenum cofactor and FAD binding domains. The gene is associated with nitrogen compound transport, nitrate import, regulation of nitrate assimilation, nitrogen utilization, zeatin anabolism, and downregulation of systemic acquired resistance. It has been linked to starch concentration, grain size, seed protein content, leaf chlorophyll content, nitrogen content, nitrate content, plant dry weight, root dry weight, and viral disease response. Associations also include nitrogen use efficiency, freezing tolerance, flowering time, stomatal function, nitric oxide production, and disease susceptibility. Related genes in other species link the family to biomass accumulation, salt stress resistance, and nitrate reduction.