To get an insight into cytokinin-induced alterations of molecular networks underlying size and structure of a leaf, transgenic Arabidopsis lines (Col-0 background) CaMV35S>GR>ipt, and CaMV35S>GR>HvCKX2 were cultivated in a growth chamber under controlled environmental conditions (50-60% relative humidity, long day, 21/19 °C day/night temperature, 110 µmol m-2 s-1). Plants were activated at 14 DAS by watering once with 50 ml of distilled water supplemented with 10 µM dexamethasone dissolved in 5x10-4% (v/v) DMSO (DEX samples). Corresponding mock-treated control plants were watered with DMSO in water.