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| 1. |
What is the effect of 1 abscisic acid and 2 red light region.on a germination of seed |
| Answer» Abscisic acid (ABA) is a plant hormone that regulates seed dormancy and germination. Seeds undergo changes in both ABA content and sensitivity during seed development and germination in response to internal and external cues. Germination is regulated by a pigment, phytochrome, which is sensitive to different wavelenghts of light. When far red light is receive the phytochrome equilibrium changes towards the red light absorbing form. | |