1. Department of Inorganic and Physical Chemistry, Faculty of Science, Palacký University, tř. Svobody 8, 771 46 Olomouc, Czech Republic; Laboratory of Growth Regulators, Faculty of Science, Palacký University & Institute of Experimental Botany, Šlechtitelů 11, 783 71 Olomouc, Czech Republic; Central Radioisotope Laboratory, Medical Faculty 1, Charles University, Na bojišti 3, 121 08 Praha 2, Czech Republic; Isotope Laboratory, Institute of Experimental Botany, Vídeňská 1083, 14220 Praha 4, Czech Republic;...