Cytokinins are a class of plant hormones that play a crucial role in regulating various aspects of plant growth and development. They promote cell division, influence shoot and root growth, and help in the formation of leaves and flowers. Cytokinins are primarily produced in the roots and are transported to other parts of the plant, where they stimulate growth and development. These hormones also interact with other plant hormones, such as auxins and gibberellins, to coordinate growth processes. Additionally, cytokinins are involved in delaying leaf senescence, which helps maintain the health and vitality of the plant. Their application in agriculture can enhance crop yield and improve the quality of produce.