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33-2 Plant Movements

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tropism
a plant movement that is determined by the direction of an environmental stimulus
phototropism
a plant movement respond to light coming from one direction
thigmotropish
a plant's growth response to touch a solid object (tendrils/veins touching an object)
gravitism
a plants growth response to gravity (roots are positively gravitropic and stems are negatively gravitropic)
chemotropism
a plants growth in response to a chemical (growth of pollen)
nastic movements
plant movements that occur in respond to environmental stimuli but that are independent of the direction of the stimuli
thigmonastic movement
a type of nastic movement that occurs in response to touching or shaking a plant (venus fly trap)
nyctinastic movements
plant movements in respond to the daily cycle of light and dark (prayer plant)