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
• Plants that have their tops trimmed out will get
  bushy plants that are slimmed from the sides
  will be thinner and taller

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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

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Photoperiodism and Flowering
Section 25-2
Short-Day Plant
Long-Day Plant
Midnight
Noon Long Day
Midnight
Noon Short Day
Midnight
Noon Interrupted Night
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Compare/Contrast Table plant adaptations
Section 25-3
Comparing Carnivorous Plants, Epiphytes, and
Parasites
Characteristics Environment Method of obtaining
nutrients Examples
Carnivorous Plants bog leaves that trap and
digest insects pitcher plant, sundew, Venus
flytrap
Epiphytes host plant gather moisture from
rainfall and produce their own food Spanish moss,
orchid
Parasites host plant extract moisture and
nutrients from host plant dodder, mistletoe