1. Graduate Programme in Ecology, Biology Institute, Department of Plant Biology, Universidade Estadual de Campinas, Monteiro Lobato 255, 13083-862 Campinas – SP, Brazil
2. Biosciences Center, Department of Botany, Federal University of Pernambuco, Avenida Moraes Rego, s/n, 50670-901 Recife – PE, Brazil
3. School of Life Sciences, University of Nevada, 4505 Maryland Parkway, Las Vegas, NV 89154-4004, USA