Plant Hormones and Responses

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Plant Hormones and Responses
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Environmental Factors
Etiolation (absence of light)
Greening (presence of light)
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Signal Reception
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More complicated ...
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Hormones
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Hormones
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Early Experiments
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Discovery of Auxin
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Activity of Auxin
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Gibberellins
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Ethylene
Ceneraria leaves rolled in from the sides in
response to exposure to ethylene
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Less Ethylene
Normal Ethylene
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Normal Ethylene
Less Ethylene
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Ethylene Senescence
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Leaf Abscission
Protective Layer (suberized)
Petiole
Separation Layer
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Ethylene Triple Response
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Abscisic Acid Stomata
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Plant Tropisms
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Phototropism
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Gravitropism (aka geotropism)
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Thigmotropism
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Nastic Movements
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Nastic Movements Action Potentials?
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Photoperiodism
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Red Light Interuptions
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Joined Plants