A Summary of Plant Hormones
| Hormone | Some of the Effects | Where Found |
|---|
| Auxins | Promote cell elongation and apical dominance; stimulate growth of new roots. | Produced in shoot apical meristem and transported elsewhere. |
| Cytokinins | Stimulate cell division; affect root growth and differentiation; may work in opposition to auxins. | Growing roots |
| Gibberellins | Stimulate growth; influence various developmental processes; promote germination. | Meristems of shoot, root, and seed embryo |
| Abscisic acid | Inhibits cell division; promotes seed dormancy. | Terminal buds; seeds |
| Ethylene | Stimulates fruits to ripen; causes plants to seal off and drop unnecessary organs, such as leaves in autumn. | Fruit tissues; aging leaves and flowers |