The gene protection effects of the hairy transgenic root extract, obtained as a result of the transformation of Scutellaria baicalensis into Agrobacterium rhizogenes, were revealed on a model of paclitaxel induced genotoxicity in mouse bone marrow and the Drosophila melanogaster somatic cells both under acute and chronic administration at the early and late periods of the study. The stimulation of granylocyto- and erythrocytopoiesis was demonstrated for the hairy roots extract of Scutellaria baicalensis on a rat model of paclitaxel- induced myelosuppression.