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Why do the leaves of touch me not plant close as soon as we touch it?

Sep 4, 2015 11:11 IST

    Q. Why do the leaves of touch me not plant close as soon as we touch it?

    Ans. At the base of every leaf of mimosa plant there is a fluid filled sac-like structure called pulvinus. As soon as we touch the plant, its cells produce electrical signals in response to which the pulvinus flushes out all its fluid. Due to this loss of fluid from the pulvinus, its cells lose the rigidity causing the leaf to droop.

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