Answer:
Turgor movement is due to
the difference of turgidity of the cells in the lower half and upper half of
pulvinus (petiole of leaf). When leaf of touch-me-not (Mimosa pudica) is
touched, the electrical-chemical signals from leaflets to pulvinus (petiole) of
leaf. Cells in the lower half of pulvinus lose water and become flaccid, while
cells in the upper half of pulvinus become turgid due to accumulation of more
water. Hence, leaf droops down for a short time.
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