Taras P. Pasternak received a Ph.D. from the Institute of Botany, National Academy of Sciences of Ukraine, Kyiv, in 1987. Taras P. Pasternak’s main scientific interests are: the role of stress and hormone interaction in plant development, mechanism of plant resistance to environmental stress, mechanism of plant growth regulation in tissue culture in vitro, and molecular and cellular mechanisms of cell differentiation- dedifferentiation, for example, on protoplast culture. Taras P. Pasternak is a Guest Associate Editor of Plant Cell Biology.