1. Department of Biophysics; Centre of the Region Haná for Biotechnological and Agricultural Research; Faculty of Science; Palacký University; 783 71 Olomouc Czech Republic
2. Photon Systems Instruments Ltd; 664 24 Drásov Czech Republic
3. Department of Mathematical Analysis and Applications of Mathematics; Faculty of Science; Palacký University; 771 46 Olomouc Czech Republic
4. Laboratory of Ecophysiological Plant Physiology; Global Change Research Institute; Czech Academy of Sciences; 603 00 Brno Czech Republic