BIOL 1010 Chapter Notes - Chapter 24: Seed Dormancy, Abscission, Cytokinin
14 May 2017
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Gibberellins make the grapes grow farther apart in a cluster (which increases air flow an decreases rotting) and produces larger grapes, a trait desired by most shoppers. In nature, gibberellins in seeds are probably the link between environmental cues and the metabolic processes that renew growth of the embryo. For example, when water becomes available to grass seed, it causes the embryo in the seed to release gibberellins, which promote germination by mobilizing nutrients stored within the seed. In some plants, gibberellins seem to be interacting antagonistically with another hormone, abscisic acid. In 1960s, one research group studying bud dormancy and another team investigating leaf abscission (the dropping of autumn leaves) isolated the same compound, abscisic acid (aba). Aba is no longer thought to play a primary role in either bud dormancy or leaf abscission (for which it was named), but it is a plant hormone of great importance in other functions.
