ABSTRACT
The influence of five combinations of nutritive medium and DMSO on the growth and the biomass of plantlets of Paulownia tomentosa were investigated. The main purpose was to optimize the nutritive regime in the pots during the starting phases of its adaptation in vivo. Best results were achieved when agent DMSO in 10.10−4 M was applied alone and in combination with nutritive solutions. The above growth was vigorous and the under-ground one was moderately developed.