1. Institute of Botany; The Czech Academy of Science; CZ-252 43 Průhonice Czech Republic
2. Department of Botany; Institute of Ecology and Earth Sciences; University of Tartu; EE-510 05 Tartu Estonia
3. Department of Experimental Plant Biology; Faculty of Science; Charles University in Prague; CZ-128 44 Prague 2 Czech Republic
4. Department of Botany; Faculty of Science; Charles University in Prague; CZ-128 01 Prague 2 Czech Republic
5. Institute of Microbiology; The Czech Academy of Science; CZ-142 20 Prague 4 Czech Republic