Ferric chelate reductase probably involved in iron reduction in leaf veins for transport. May participate in the transport of electrons to a Fe(3+) ion via FAD and heme intermediates. 2 a Fe(II)-siderophore + H(+) + NAD(+) = 2 a Fe(III)-siderophore + NADH Expressed in shoots. Detected in roots, pedicels, flowers, siliques and leaf veins. Down-regulated in shoots by copper deficiency. Not regulated by iron availability. Belongs to the ferric reductase (FRE) family.