1. Czech University of Life Sciences, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Department of Ecology, Kamýcká 129, Praha - Suchdol, 165 00, Czech Republic
2. Department of Botany & Plant Sciences, University of California-Riverside, Riverside, CA 92521, U.S.A.
3. Department of Biological Sciences, University of Toronto Scarborough, Toronto, ON, Canada M1C 1A4