How Mimosa Pudica(Touch-me-not)'s leaves begins to fold up and droop in response to touch?
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The touch-me-not shrinks due to loss of turgidity (the pressure of content against the cell wall) by cells within the pulvini-specialised motor organs at leaf joints. Upon stimulation, like touching, the leaf cells lose potassium ions, triggering water to leave the cells through osmosis.
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