1. Laboratory of Growth Regulators, Palacký University and Institute of Experimental Botany, The Czech Academy of Sciences, Šlechtitelů 27, 783 71 Olomouc, Czech Republic
2. Isotope Laboratory, Institute of Experimental Botany, The Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic
3. Institute of Pathological Physiology, First Faculty of Medicine, Charles University, 128 53 Prague, Czech Republic
4. Institute of Organic Chemistry and Biochemistry, The Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague 6, Czech Republic
5. Institute of Molecular Genetics, The Czech Academy of Sciences, Vídeňská 1083, 142 20 Prague, Czech Republic
6. Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 3, 121 16 Prague 2, Czech Republic