1. Institute of Botany, Faculty of Biology, Jagiellonian University, Gronostajowa 3, Kraków 30-387, Poland
2. Institute of Botany, Pedagogical University of Krakow, Podchorążych 2, Kraków 30-084, Poland
3. Laboratory of Ecochemistry and Environmental Engineering, W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, Kraków 31-512, Poland