title: Regulated redox processes at the plasmalemma of plant root cells and their function in iron uptake.
abstract: Plants take up iron as ferric chelates or, after reduction, as ferrous ions. Ferric reduction takes place at the plasma membrane of the root epidermis cells by a transmembrane redox system, which can be activated when iron is getting short. It is proposed that this inducible system, with NADPH as electron donor, is separate from a system, presumably present in all plant cells, which transports electrons from NADH or NADPH to ferricyanide, or, in vivo, oxygen.
authors.forename: H F
authors.initials: HF
authors.lastname: Bienfait
mesh_terms: D002462:Cell Membrane / Q000502:physiology*; D004579:Electron Transport; D005290:Ferric Compounds / Q000378:metabolism; D005296:Ferrous Compounds / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000378:metabolism*; D007502:Iron Chelating Agents / Q000378:metabolism; D009243:NAD / Q000378:metabolism; D009249:NADP / Q000378:metabolism; D010084:Oxidation-Reduction; D059828:Plant Cells; D010944:Plants / Q000378:metabolism; D017262:Siderophores
chemical_list: D005290:Ferric Compounds; D005296:Ferrous Compounds; D007502:Iron Chelating Agents; D017262:Siderophores; D009243:NAD; D009249:NADP; D007501:Iron