Arabidopsis root-type ferredoxin:NADP(H) oxidoreductases are crucial for root growth and ferredoxin-dependent processes.

Root-type ferredoxin:NADP(H) oxidoreductase (RFNR) is believed to reduce ferredoxin using NADPH in nonphotosynthetic tissues, facilitating ferredoxin-dependent biological processes. However, the physiological functions of RFNR remain unclear due to the difficulty in obtaining mutants lacking redundant RFNR isoproteins. The present study successfully generated Arabidopsis homozygous rnfr1;2 double mutants by traditional crossing and selection.

Alternative Oxidase Alleviates Mitochondrial Oxidative Stress during Limited Nitrate Reduction in .

The conversion of nitrate to ammonium, i.e., nitrate reduction, is a major consumer of reductants in plants.