1. Ecology and Natural Resources Post-Graduate Program; Department of Biology; Federal University of Ceará; 60440-900 Fortaleza CE Brazil
2. Department of Biology; Federal University of Ceará; 60440-900 Fortaleza CE Brazil
3. Department of Plant Biology; Institute of Biology; University of Campinas - UNICAMP; PO Box 6109 13083-970 Campinas SP Brazil
4. Federal University of Piauí (UFPI/CPCE); Campus Professora Cinobelina Elvas 64900-000 Bom Jesus PI Brazil
5. Institute of Rural Development; University of International Integration of African-Brazilian Lusophony; 62790-000 Redenção CE Brazil
6. Department of Biochemistry and Molecular Biology; Federal University of Ceará; 60440-554 Fortaleza CE Brazil