1. Institute for Molecular Plant Physiology and Biophysics University of Wuerzburg D‐97082 Wuerzburg Germany
2. Department of Applied Biological Science Tokyo University of Science 2641 Yamazaki Noda 278‐8510 Japan
3. School of Bioscience and Biotechnology Tokyo University of Technology Hachioji Tokyo 192‐0982 Japan
4. Department of Plant Molecular Biology University of Lausanne Biophore 1015 Lausanne Switzerland