Let me share with you a comparison between Abscisic Acid (ABA) and Gibberellins (GA).
| Aspect | Abscisic Acid (ABA) | Gibberellins (GA) |
| Chemical Structure | C₁₅H₂₀O₄ | A complex family of compounds, such as GA₁, GA₃, etc. |
| Role in Plant Growth | Inhibits growth and induces dormancy. | Promotes stem elongation, cell division and seed germination. |
| Function in Stomatal Closure | Induces stomatal closure to reduce water loss. | Has no direct effect on stomatal closure. |
| Effects on Seed Germination | Inhibits seed germination. | Stimulates seed germination. |
| Stress Response | Induced by stress conditions (drought, salinity). | Induced by favorable growth conditions. |
| Translocation | Mostly synthesized in chloroplasts and moves passively. | Synthesized in meristematic tissues and actively translocated. |
| Synthesis Location | Synthesized in response to stress in various plant tissues. | Synthesized in young leaves, roots and embryos. |
| Environmental Response | Responds to adverse environmental conditions. | Responds to favorable environmental conditions. |