J.C. REVY, ISM / SCIENCE PHOTO LIBRARY J.C. REVY, ISM / SCIENCE PHOTO LIBRARY
Sensitive plant. Time-lapse image of a sensitive plant, Mimosa pudica, reacting to touch. The leaves change from a normal, open and rigid structure (at upper right) to a folded stressed appearance (at lower right) in a matter of seconds. This is a natural reaction against a number of stresses (such as touch, infection or drought). Rapid movement is brought about by physiological changes in the plant's cells. Electrical impulses emerge from damaged cells. These cause water-containing vacuoles (that usually maintain the plant's rigidity) to release water and cause the leaves to curl. If left untouched, the leaves slowly return to normal.
Model release not required. Property release not required.