Phytohormone

Phytohormones, also known as natural plant hormones or endogenous plant hormones. It refers to some trace organic compounds produced in plants that can regulate (promote, inhibit) their own physiological processes. It is known that there are six major categories of hormones produced in plants, namely auxin, gibberellin, cytokinin, abscisic acid, ethylene, and brassinosteroid. They are all simple small molecule organic compounds, but their physiological effects are very complex and diverse. From affecting cell division, elongation, and differentiation to affecting plant germination, rooting, flowering, fruiting, sex determination, dormancy, and abscission.