1. Laboratory of Biotechnology of Olive, Center of Biotechnology of BorjCedria, BP 901, 2050, Hammam-Lif. Tunisia
2. University of Tunis El Manar, Faculty of Sciences of Tunis, Campus University, Tunis 1060. Tunisia
3. CREA Research Centre for Olive, Citrus and Tree Fruit, C. da Li Rocchi, 87036 Rende (CS). Italy.