AP Biology Plant Hormones
AP Biology Hormones
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| 860183 | auxin (IAA) | stimulates stem elongation, root growth, cell differentiation, and branching; regulates development of fruit; enhances apical dominance; functions in phototropism and gravitropism; promotes xylem differentiation; retards leaf abscission | |
| 860184 | cytokinins | affect root growth and differentiation; stimulate cell division and growth; stimulate germination; delay senescence | |
| 860185 | gibberellins | promote seed and bud germination, stem elongation, and leaf growth; stimulate flowering and development of fruit; affect root growth and differentiation | |
| 860186 | brassinosteroids | inhibit root growth; retard leaf absciccion, promote xylem differentiation | |
| 860187 | abscicic acid | inhibits growth; closes stomata during water stress; promotes seed dormancy | |
| 860188 | ethylene | promotes fruit ripening, opposes some auxin effects; promotes or inhibits growth and development of roots, leaves, and flowers, depending on species |