FNR1 — triticum aestivum

Summary

TRAESCS6D02G012200, designated TaFNR1 on bread wheat chromosome 6D, encodes a ferredoxin-NADP⁺ reductase (EC 1.18.1.2), a flavoprotein with oxidoreductase activity acting on iron-sulfur proteins as donors. The protein localises to the chloroplast thylakoid membrane and stroma. TaFNR1 is associated with regulation of tetrapyrrole anabolism, sucrose metabolism, and positive regulation of HR. It is linked to grain weight, grain filling period, starch content, photosynthetic rate, respiration rate, and stripe rust and bacterial blight disease resistance. Additional associations include stomatal closure, salinity tolerance, and redox homeostasis. Studies of related genes in other species link the family to carbon fixation, photosynthetic electron flow, and defense responses, as well as nitrogen metabolism and growth.