1. Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, University of Helsinki, FI-00014 Helsinki, Finland
2. Viikki Plant Science Center, University of Helsinki, FI-00014 Helsinki, Finland
3. Department of Biochemistry/Molecular Plant Biology, University of Turku, FI-20014 Turku, Finland
4. Max-Planck Institute for Molecular Plant Physiology, D-14476 Potsdam-Golm, Germany
5. Center of Plant Systems Biology and Biotechnology, 4000 Plovdiv, Bulgaria
6. Photon Systems Instruments, 664 24 Drásov, Czech Republic