Cytokinins and cytokinin-binding sites in transgenic potato plants

The introduction of the gene for cytokinin biosynthesis into the potato genome led to a manifold increase in the level of cytokinins (zeatin and zeatin riboside) in transgenic plants grown in vitro. The high amount of endogenous cytokinins in 20-day-old plants of clone 1339-3A correlated with high cytokinin-binding capacity of ribosomes that is presumably attribute to a cytokinin receptor.