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8 Cards in this Set
- Front
- Back
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Auxins
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-Include Indoleacetic acid IAA
-Control enlargement and elongation of plant cells -Helps formation of vascular tissue -Involved in the formation of fruit |
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Auxin
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-Inhibits the growth of lateral buds into side branches
-When the bud at apex is removed, source of IAA is removed meaning growth upwards is stopped |
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Gibberellins
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-Promote plant growth by stimulating cell elongation and cell reproduction
-Initiate seed germination and bud development |
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Cytokinins
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-Growth promoting hormone. Acts on: shoots, roots and fruits
-Promote cell reproduction |
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Abscisic Acid (ABA)
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-Acts as an inhibitor
-Promotes closure of stomata during times of water stress -Stimulates dormancy -Promotes leave fall |
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Ethylene
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-Involved in fruit ripening
-Inhibits root growth -Breaks dormancy -Promotes ageing in the plant |
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Photoperiodism
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-Response to periods of darkness in response to light
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Geotropism
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-When a plant responds to gravity
-When a shoot turns upwards away from gravity it's negative geotropism -When roots grow towards gravity it's positive geotropism. |
