Hormones are long-distance chemical signals in plants. They coordinate many responses including growth, reproduction, dormancy, and stress responses. The five major categories of plant hormones are au...Hormones are long-distance chemical signals in plants. They coordinate many responses including growth, reproduction, dormancy, and stress responses. The five major categories of plant hormones are auxins, cytokinins, gibberellins, abscisic acid, and ethylene.
