nastic movement, nastic response


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nastic movement, nastic response

or

nasty

a growth movement in plants that takes place in response to a diffuse, or nondirectional stimulus. An example is the opening and closing of Crocus flowers due to changes in temperature.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005