1. Laboratory of Growth Regulators Institute of Experimental Botany of the Czech Academy of Sciences, Faculty of Science of Palacký University Olomouc CZ‐78371 Czech Republic
2. Department of Chemical Biology, Faculty of Science Palacký University Olomouc CZ‐78371 Czech Republic
3. Department of Experimental Biology, Faculty of Science Palacký University Olomouc CZ‐78371 Czech Republic
4. Department of Plant Physiology, Umeå Plant Science Centre Umeå University Umeå SE‐90736 Sweden