Plant Tropisms

1
Plant Tropisms
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• A plants growth response towards or away from a
  stimulus
• Growing towards a stimulus is a positive response
• Growing away from a stimulus is a negative
  response
• Plants respond to touch, light and gravity
• Hormones allow plants to respond by stimulating
  growth.

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What are these plant stems responding to?
Positive response to light phototropism
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What are these roots responding to?
Positive response to gravity geotropism
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What is the stem of this plant responding to?
Negative response to gravity neg.geotropism
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What are the stem and leaves of this plant
responding to?
Positive phototropism
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What is the tendril from this plant responding to?
Positive to touch positive thigmatropism
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What are the stems of these plants responding to?
Positive phototropism
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What is the stem of this plant responding to?
Negative geotropism
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What is the tendril from this plant responding to?
Positive thigmatropism
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What are these tendrils from this plant
responding to?
Positive thigmatropism