Electrodes measure leaf movement

Electrodes measure leaf movement

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Credit: J.C. REVY, ISM/SCIENCE PHOTO LIBRARY

Caption: Leaf movement experiment. Electrodes attached to the leaves, leaf stalk, and stem of the sensitive plant Mimosa pudica to detect leaf movement. These electrodes measure the bioelectrical responses of the leaves which open or curl closed in response to stress. When touched, the leaves suddenly curl closed as seen here. When the stress is associated with slow leaf damage, such as dehydration, leaf closure is slower and progressive. This natural leaf reaction is a protective mechanism against predators, heat and drought. The movement is due to changes in water content of the plant cells which affects leaf rigidity, causing leaf closure. See photo B740/233 showing the graph of results.

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Keywords: botany, electrode, experiment, leaf, leaf electrod, leaf electrodes, leaf graph, leaf movement, leaves, mimosa pudica, nature, plant, plants, sensitive, sensitive plant, touch sensitive

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