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sionnach commented on the word thigmonasty
Touch-induced movements.The leaves of the momosa plant respond to being touched, shaken, heated, or rapidly cooled. The speed of the responses depend on the magnitude of the stimuli.One of the more dramatic examples of thigmonasty in plants is the snapping shut of the leaf of a Venus Flytrap when it detects movement on its surface.
December 3, 2007