1. Laboratory of Growth Regulators, Faculty of Science Palacký University and Institute of Experimental Botany of the Czech Academy of Sciences CZ‐78371 Olomouc Czech Republic
2. Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology Swedish University of Agricultural Sciences SE‐90183 Umeå Sweden
3. Department of Chemical Biology, Faculty of Science Palacký University CZ‐78371 Olomouc Czech Republic