Leaves and Storms
Name: Sheila H.
Please tell me why leaves turn upside down when a storm
is almost here?
Possibly helpful, although probably depends upon the plant species and its
physiology and responsiveness, and environmental conditions.
"Plants typically respond by various growth movements to unpredictable,
usually short-term environmental fluctuations, like changes in temperature
or light, . For example, some flowers like crocus are temperature sensitive
and open when it is warm and close when it is cooler. The flowers of an
alpine species (Gentiana algida) close up before a thunderstorm. The
flowers actually respond to the decreased temperature associated with the
storm front and close to avoid pollen being washed out of the flower by the
Anthony Brach Ph.D.
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Update: June 2012