Ferric chelate reductase. May participate in the transport of electrons to a Fe(3+) ion via FAD and heme intermediates (PubMed:16006655). May function as root surface cupric chelate reductase and participate in the reduction of Cu(2+), for Cu(+) acquisition via Cu(+) transporters in response to copper deficiency (PubMed:22374396). 2 a Fe(II)-siderophore + H(+) + NAD(+) = 2 a Fe(III)-siderophore + NADH Expressed in siliques. Detected at low levels in roots, cotyledon veins and shoots. Induced by copper deficiency in a SPL7-dependent manner. Belongs to the ferric reductase (FRE) family.