ACHIM, Gheorghe, University of Craiova, Faculty of Horticulture, Department of Horticulture and Food Science, 13 A.I. Cuza Street, 200585 Craiova; University of Craiova, S.C.D. P. Vâlcea, 464 Calea lui Traian street, 240273, Râmnicu-Vâlcea, Romania