Nyctinasty is the circadian rhythmic nastic movement of higher plants in response to the onset of darkness. Examples are the closing of the petals of a flower at dusk and the sleep movements of the leaves of many legumes. Nyctinastic movements are associated with diurnal light and temperature changes and controlled by the circadian clock and the l...Found on http://en.wikipedia.org/wiki/Nyctinasty
A nastic movement in a plant that is caused by light and dark.
Found on http://www.superglossary.com/Glossary/Science/Biology/
nyctinasty, nytinastic, nyctinastism 1. The movements of flowers or leaves, caused by a regular cycle of changes in light and temperature. 2. Orientation movements of plants during the night. Nastic movements of plant organs in response to the changes in light and temperature that occur between day and night (and vice versa). Examples are the open...Found on http://www.wordinfo.info/words/index/info/view_unit/2563/
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