👉 A hormone is a chemical substance that is produced by cells and sent into circulation to regulate various physiological functions. Phytohormones are hormones that are involved in plant growth, development, and maintenance of plant tissues and organs. Phytohormones play crucial roles in the regulation of plant growth, development, and function. They involve a series of chemical reactions that occur within cells, which then affect the growth, health, and structure of plants. Some examples of phytohormones