Other Plant Movements

Other Plant Movements - Other Plant Movements Nastic...

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Unformatted text preview: Other Plant Movements Nastic movements Although anchored in place by root systems, plants move their organs in response to many kinds of external stimuli. These movements are called nastic movements and differ from tropic movements in that they are not directed toward or away from the stimulus. Movements triggered by touch, such as closing the traps of insectivorous plants, are called thigmonastic or seismonastic movements. The changing daily cycles of light and darkness produce “sleep” ( nyctinastic ) movements in leaves of many species. Most of the actual nastic movements can be explained by changes in the turgor pressure of specially located parenchyma cells after a stimulus has been received. Thigmomorphogenesis The growth response to generalized mechanical disturbances is called thigmomorphogenesis . Plants in their natural environment are subject to all manner of jarring, touching, and shaking by the...
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