Why does touch-me-not plant closes its leaves when touched? How much time does it take for the leaves to come back to normal position ?
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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. It takes about 10 minutes for the cells to regain turgidity and the leaves to open out.
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. It takes about 10 minutes for the cells to regain turgidity and the leaves to open out.
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