Cytokinin stimulates the cell division in plants. It has following history of discovery: Earlier, it was believed that coconut milk contain cell division causing factors. The developing endosperm of maize also contains such factors. Later, herring (fish) sperm DNA was heated. It gives cell


The special substances produced by the plants which influence the growth and plant responses are called plant hormones. Plant hormones are auxins, gibberellins, cytokinins, abscisic acid and ethylene. AUXINS The natural auxin is indole acetic acid (IAA). A large number of synthetic auxins are