Dehydrins (DHNs) are plant-specific proteins that accumulate during the abiotic stress that cause cellular dehydration, such as drought, salinity and freezing. How the dehydrin system in conifers reacts to more short-term drought stress is much less studied. Therefore, we studied the dynamics of dehydrin system in seedlings of Scots pine and Norway spruce both on mRNA and on protein levels under conditions of polyethylene glycole 6000 (PEG)-induced water deficit of different intensities.