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

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
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References in periodicals archive ?
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.