1. The Henryk Niewodniczañski Institute of Nuclear Physics, ul. Radzikowskiego 152, 31-342 Kraków, Poland
2. Fakultät für Biologie, Lehrstuhl Zellphysiologie, Universität Bielefeld, D-33501 Bielefeld, Germany
3. Department of Plant Physiology and Biochemistry, The Jan Zurzycki Institute of Molecular Biology, Jagiellonian University, Al. Mickiewicza 3, 31-120 Kraków, Poland