| Darwin studied nyctinasty and hypothesized that it might protect against lower nighttime temperatures. |
| We found that nyctinasty is controlled by a periodic change of the internal concentration of leaf-opening and leaf-closing substances in the plant body. |
| What is the selective advantage to plants of nyctinasty which closes flowers in the evening? |
| One well-known and well-studied sleeplike state is called nyctinasty, or night movement. |
| Other scientists suggest that in rainforest plants, nyctinasty allows for maximum daytime sun exposure while folding sheds excess water at night. |
