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17 Cards in this Set
- Front
- Back
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stimulus
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internal or environmental factor that can trigger a response
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hormone
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chemical produced in small amounts at one place in an organism, that travels to and intiates a response at another place in an organism
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signal transduction
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receptor activates secondary messenger molecules
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induction
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secondary messenger activates a response by altering gene regulation
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photo
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light
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gravi
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gravity, direction and amount of force
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thigmo
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touch
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tropic
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movement, growth
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nastic
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movement that can go back and forth, turgor
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morphogenic
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change in the form of the plant
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positive directional responses
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toward stimulus
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negative directional responses
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away from stimulus
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Stimulatory hormones
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1.Auxins
2. Cytokinins 3. Gibberellins 4. Brassinosteriods |
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Senescence and Dormancy Hormones
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1. Abscisic Acid
2. Ethylene |
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location of auxin
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shoot tips, young leaves, developing fruits and seeds
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Auxins
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growth of stem and roots and fruits, apical dominance
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Pratical Application of Auxin
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agent orange defoliant--- causes all photosynthetic parts of the plant to fall off
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