1. Department of Experimental and Functional Morphology Institute of Botany of the Czech Academy of Sciences, Dukelská 135, CZ‐379 82 Třeboň Czech Republic
2. Laboratory of Hormonal Regulations in Plants, Institute of Experimental Botany of the Czech Academy of Sciences Rozvojová 263, 165 02 Prague 6 Czech Republic
3. Department of Ecology and Environmental Sciences Palacký University, Šlechtitelů 241/27, CZ‐783 71 Olomouc Czech Republic
4. Department of Botany, Faculty of Science Charles University Benátská 2, CZ‐128 01 Praha 2 Czech Republic