1. Flanders Center of Postharvest Technology/BIOSYST-MeBioS; KU Leuven; Willem de Croylaan 42 B-3001 Leuven Belgium
2. Centre for Crop Systems Analysis; Wageningen University; P.O. Box 430 6700 AK Wageningen The Netherlands
3. BioSolar Cells; P.O. Box 98 6700 AB Wageningen The Netherlands
4. Laboratory for Application of Synchrotron Radiation/ANKA; Karlsruhe Institute of Technology; P.O. Box 3640 D-76021 Karlsruhe Germany
5. ESRF - The European Synchrotron, CS40220; F-38043 Grenoble Cedex 9 France
6. Research School of Biology; The Australian National University; Canberra ACT 2601 Australia