1. Laboratory of Pollen Biology, Institute of Experimental Botany ASCR, v. v. i., Rozvojová 263, 165 02 Prague 6, Czech Republic, Department of Plant Physiology, Faculty of Science, Charles University in Prague, Viničná 5, 128 44 Prague 2, Czech Republic, Department of Plant Physiology and Anatomy, Faculty of Biological Sciences, University of South Bohemia, Branišovská 31, 370 05 České Budějovice, Czech Republic, Laboratory of Mass Spectrometry, Faculty of Science, Charles University in Prague, Viničná 7,...