Graduate School of Experimental Plant Science and Laboratory of Genetics (E.J.M.C., M.E.E.-L., G.J.R., H.B.-D.V., M.K.) and Laboratory of Plant Physiology (M.E.E.-L., D.V.), Wageningen University, NL–6703 BD Wageningen, The Netherlands; Department of Biochemistry and Molecular Biophysics, University of Arizona, Tucson, Arizona 85721 (E.V.); and Plant Research International, Wageningen-University (At 2004-05-01)
