Introduction to plant sensitivity

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  • Intro to plant sensitivity
    • leads to survival advantage
    • Response
      • Growth
        • Tropisms
        • permanent increase in size due to water intake
        • mainly takes place in the meristem located behind tips of root and shoot
        • increase in biomass
      • Movement response
        • thigmotropisms
        • touch/pressure
          • venus fly trap
    • Receptors
      • detect stimuli
        • water
          • hydrotropism
        • gravity
          • geotropism
        • chemicals
          • chemotropism
        • light
          • phototropism
        • can all be positive or negative
          • negative = grows away from stimuli
          • positive = grows towards stimuli
    • hormones
      • chemical messages
        • move cell to cell and via phloem
        • auxins
          • phototropisms

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