When we touch chuimui... it folds its leaves becoz when a stimuli touch it a process take place in them..

**How Touch Me Not Acts on Our Touching**

Touch Me Not, also known as Mimosa pudica, is a fascinating plant that displays a unique response to touch. When its leaves are touched, the leaflets quickly fold inwards and droop downwards. This intriguing phenomenon is a result of the plant's ability to respond to external stimuli, which is a characteristic of coordination in plants.

**Coordination in Plants - Control and Coordination**

Coordination is the ability of an organism to respond to changes in its environment or internal conditions. In plants, coordination is achieved through various mechanisms, including chemical signals, electrical signals, and movement of plant parts. Touch Me Not demonstrates coordination through its response to touch.

**Response of Touch Me Not to Touch**

When Touch Me Not is touched, it triggers a rapid response known as thigmonasty. Thigmonasty is a type of nastic movement, which is a non-directional response to stimuli. The response is initiated by the movement of ions and water across the cells of the plant.

**Mechanism of Thigmonasty in Touch Me Not**

The response of Touch Me Not to touch involves several steps:

1. Touch stimulation: When the plant is touched, mechanoreceptors present in the cells of its leaves detect the mechanical stimulus.

2. Electrical signals: The touch stimulus triggers the generation of electrical signals, known as action potentials, in the cells of the plant. These action potentials travel through the plant's tissues, allowing the signal to propagate.

3. Ions and water movement: The action potentials lead to the movement of ions, particularly calcium ions, across the cell membranes. This movement of ions causes changes in water movement within the cells.

4. Water loss: As a result of the ion movement, water is lost from specific cells in the leaflet pulvini, which are specialized structures responsible for leaf movement. This water loss causes a decrease in turgor pressure within these cells.

5. Folding response: The decrease in turgor pressure causes the leaflets to lose their rigidity and fold inwards. This folding response is an adaptive mechanism that helps protect the plant from potential harm, such as herbivory or physical damage.

**Conclusion**

Touch Me Not exhibits a remarkable response to touch through thigmonasty. This response involves the detection of touch, generation of electrical signals, movement of ions and water, and subsequent folding of the leaflets. The ability of Touch Me Not to coordinate its response to touch demonstrates the fascinating mechanisms of control and coordination in plants.