The hormones that control and coordinate the activities in plants are called plant hormones. The four types of plant hormones are:
(i) Auxins – It promotes cell enlargement and cell differentiation in plants.
(ii) Gibberellines – It helps in breaking the dormancy in seeds and buds.
(iii) Cytokinins – It promotes cell division in plants.
(iv) Abscisic acid – It promotes the dormancy in seeds and buds.