Physiological effects of cytokinins.
1. Promotion of cell division: The major physiological role of naturally occurring cytokinins isto promote cell division. It is now well established that these are true cell division factors in anumber of lower and higher plants. In the presence of auxins, nearly all cytokinins stimulate celldivision and subsequent callus growth in the parenchymatous cells of several plants.
2. Cell enlargement: The cytokinins can also induce cell enlargement like auxins andgibberellins. This effect of cell...