1. a Unit of Biodiversity and Valorisation of the Bioresources in Arid Zones, Faculty of Sciences of Gabès, University of Gabès, Cité Erriadh, Zrig , Gabès , Tunisia
2. b Post-Harvest & Wine Technology Division, Agricultural Research Council (Infruitec-Nietvoorbij) , Stellenbosch , South Africa
3. c Department of Food Science , Stellenbosch University , Matieland , South Africa
4. d Departament de Biologia Vegetal , Universitat de Barcelona, Facultat de Biologia , Barcelona , Spain