CONCLUSIONS 1. The 60- and 100-fold increase in copper content in the MS medium positively influenced micropropagation(number of shoots in Dendrobium kingianum Bidwill orchid plants. These higher levels of copper in the MS culture medium could be said to enhance morphogenetic response of orchid pseudobulb explants and the success of many micropropagation programs. 2. In the variant with the highest copper concentration(6.0 mg CuSO x 5H O dma, a negative influence af the metal on the length of roots and fresh biomass of Dendrobium kingianum Bidwill was noted. 3. The copper accumulation in both shoots and roots increased with the increase in the external Cu level, but the content of other metals was only slightly affected at higher cu concentrations(Zn and Ca content decreased but Fe increased both in roots and in shoots