How do sensitive plants respond to touch?

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(B) Sensitive plants,such as $Mimosa$ $pudica$ (touch-me-not),respond to touch through a mechanism involving changes in the amount of water in their c

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Hormones

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(B) Sensitive plants,such as $Mimosa$ $pudica$ (touch-me-not),respond to touch through a mechanism involving changes in the amount of water in their cells. When touched,the plant cells at the base of the leaflets lose water,which leads to a loss of turgor pressure. This change in turgor pressure causes the leaves to fold or droop. This movement is independent of growth and is regulated by the movement of water,which is a type of plant movement known as thigmonasty. Since plants do not possess nervous or muscular tissues,they rely on chemical and physical changes (like water movement) to respond to stimuli.

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