Ferric chelate reductase probably involved in iron reduction in shoots. May participate in the transport of electrons to a Fe(3+) ion via FAD and heme intermediates. May act in iron metabolism in reproductive organs (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 at low levels in roots, shoots, pedicels and inflorescence stems, flowers, sepals, stigmas and anther filaments. Up-regulated in roots and shoots by iron deficiency and copper deficiency (PubMed:16362328). Induced by copper deficiency in a SPL7-dependent manner (PubMed:22374396). Belongs to the ferric reductase (FRE) family.