1. Justus-Liebig-University Giessen; AG Spezielle Botanik; Heinrich-Buff-Ring 38 35392 Giessen Germany
2. Botanic Garden and Botanical Museum Berlin-Dahlem; Freie Universität Berlin; Königin-Luise-Str. 6-8 14195 Berlin Germany
3. Institute for Biochemistry I; Medical Faculty; University of Cologne; Joseph-Stelzmann-Str. 52 50931 Cologne Germany
4. Molecular Biology Group; Leibniz-Institute of Freshwater Ecology and Inland Fisheries; Müggelseedamm 310 12587 Berlin Germany