BRAINCAKEGibberellins: Synergy and Antagonism.
Gibberellins also affect the length of the internodes by stimulating cell elongation. Auxins and gibberellins work synergistically in the growth of stems. ABA and gibberellins work antagonistically in the germination of seeds.
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Key terms in this lesson
- Auxin
- A plant hormone, produced mainly at shoot and root tips, that stimulates cell elongation and controls tropisms and apical dominance.
- Gibberellin
- A plant hormone that stimulates stem elongation and the breaking of seed dormancy and germination.
- Abscisic acid
- A plant hormone that maintains dormancy and causes stomatal closure in response to water stress.
More in Plant Responses
- Plant Growth Responses
- Plant Hormones
- Seed Germination
- Apical Dominance
- Leaf Loss
- Flowering and Day-Length
- Preventing Freezing
- Stomatal Control
All 19 lessons in Plant Responses · All OCR A-level Biology topics