concentrations on organagenesig of many plants. NAS(2004) suggested that higher levels af Cu(up ta 6.1 mg Cus0, x 6H,0 dmay enabled hazelnut(Corytus epp.) explants to divert their resources from unorganized cell division(callus production) to cell differentiation(shoot and bud formation), and it might be necessary to use higher levels of this medium component in order to enhance the morphogenetic potential of explants. These findings are s upported by the resulta observed by GARcA-Soco et al. (1991 who reported that the addition of CuSO medi um increased the organogenic response of explants, the frequency of organo- genic call xtension of organized growing areas in the calli and the us, the development of organogenic structures in melon(Cucumis meio L.). The most favourable concentration was found to e 1 0 mg of copper sulphate per dm ur fine dings suggest that higher levels of Cu(mostly 0.625 mg CuSO 5Hao dmy stimulated the formation of longer orchid shoots and roots, RAFA et al. (2012) reported that th e h ghest number of branches and leaves per explant for apple and pear was obtained in a treatment with 0.06 mg dm a of copper in culture medium. At the rooting stage, the eleveted levels of copper very effective in stimulating root formation in both apple and pear shoots. The highest number of roots in apple was achieved while adding 0 0.2 mg dma of copper to culture medium. Th data suggest that the higher levels of copper enabled shoot and root formation in the explants, and it might be necessary to use higher levels of this medium component in orde to enhance the morphogenetic potential of explanta. JoeHI and KoTHARI(2007) reported that elevated concentrations of copper in medium had a positiv effect on the induction of shoat buds and their further development from cotyledon explants of Capsicum annuum L. The highest number of shoots nd longer shoots were obtained from 1 explant on medium with 4.8 mg Cu80,dm