Also called morphogenesis, it has a more obvious effect on inhibiting growth and germination. It can dwarf plants, destroy apical dominance, promote flower bud differentiation, promote abscission formation and inhibit gibberellin synthesis in plants.

The regulation of plant hormones on growth and physiological processes is often not the only function of a certain plant hormone. Because various endogenous hormones in plants can have synergistic or antagonistic effects, only the coordination of various hormones can ensure the normal growth and development of plants.