thermonasty


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thermonasty

(ˈθɜːməʊˌnæstɪ)
n
(Botany) botany a nastic movement in response to a temperature change, as occurs in the opening of certain flowers
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

thermonasty

the tendency in certain plant species to respond to temperature changes by developing a sufficient cellular force or growth on one side of an axis to change the form or position of the axis, as in the closing or folding of rhododendron leaves in cold air. Cf. photonasty.thermonastic, adj.
See also: Plants
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
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Other nastic responses include thermonasty, as in the opening and closing response of tulips due to fluctuations in temperature; nyctinasty, the so-called sleep movements of leaves due to changes of turgor of certain cells located at the base of the petiole; and seismonasty, a response to shaking or some other mechanical disturbance.
Hubert Vecchierello, O.F.M., she completed her thesis on "Thermonasty of Spring Flowers." She also earned an M.A.
thermonasty: Plant movement caused by temperature: The movement of plant parts in response to a change in temperature, for example, the opening of flowers.