1. Auxin is first introduced by F.W. Went.
1. Cytokinin is first isolated by Miller and Skoog.
2. It is produced in the shoot apex and leaf primordia.
2. It is found in the endosperm and embryo of seeds, in fruits and roots.
3. Auxins promote the growth of apical bud.
3. Cytokinins promote the growth of lateral buds.