Plant Propagation, Plant Hormones, Plant Responses

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Plant Propagation, Plant Hormones, Plant Responses
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Compare/Contrast Table
Section 24-1
Comparing Plant Propagation Methods
Method Procedure
Cuttings
Grafting
Budding
Vegetative reproduction takes place naturally
parent plant puts out runners that grow new
plants (Ex. Strawberries)
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Hormones

• Substance that is produced in one part of an
  organism that affects another part of that same
  organism
• Main plant hormones
• Auxins
• Gibberellins
• Ethylenes

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Auxins

• Result in plant bending in response to light
• Also result in stems going up and roots going
  down

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Gibberellins and Ethylene

• G produce dramatic increases in size
  particularly in stems and fruit
• E in response to auxins, fruit tissues release
  ethylene which causes ripening

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Plant Responses

• Tropisms responses of plants to environmental
  stimuli
• Types of tropisms
• gravitropism
• phototropism
• thigmotropism

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Gravitropism and Phototropism

• Gravitropism response of a plant to gravity
  stems go up, roots go down
• Phototropism response of a plant to light
  (bending toward the light)

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Meristems control plant growth.
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Thigmotropism

• Response of plants to touch
• Can stunt growth
• Can cause twining of plant tendrils with vines
  and climbing plants
• can have as a quick response Venus flytrap