1. Laboratory of Biotechnology and Environment, Department of Plant Biology, Faculty of Science, University of Yaounde I, Yaounde, Cameroon
2. Department of Plant Biology, University of Bamenda, Bamenda, Cameroon
3. Institute of Agricultural Research for the Development (IRAD), Bertoua, Cameroon
4. Laboratory of Phytopathology, Biotechnology and Environment, Department of Plant Biology, University of Yaounde I, Yaounde, Cameroon
5. Department of Ecology and Natural Resources Management, Center for Development Research, Bonn, Germany