Characteristics of Phytohormones: � All phytohormones are organic substance in nature. � They regulate the growth, development, differentiation of plants. � They are generally formed at the apices of root stem and leaves. � They are translocated from one organ to other through xylem and phloem. � They are required in very little amount. � They affects all events in the life cycle of a plant like seed germination, flowering, dormancy, senescence, movement and growth etc.