Movement of leaves in touch me not plant is

Options

A. Thigmotropism
B. Nyctinasty
C. Thigmonasty
D. Seismonasty

Answer

### Step-by-Step Solution

1. **Understanding the Plant**: The touch-me-not plant, scientifically known as Mimosa pudica, is known for its unique ability to respond to touch.

2. **Identifying the Types of Movements**: There are different types of plant movements, including thigmotropism, nictinasty, thigmonasty, and sysmonasty. Each of these movements has specific characteristics and triggers.

3. **Analyzing the Options**:
- **Thigmotropism**: This is a directional growth movement in response to touch, typically seen in climbing plants. It is not the correct answer for the touch-me-not plant.
- **Nictinasty**: This refers to movements that occur in response to the daily light-dark cycle, such as the closing of flowers at night. This is also not applicable to the touch-me-not plant.
- **Thigmonasty**: This movement occurs in response to touch but is more about the plant's reaction to stimuli like wind or pollen. This is not the specific movement seen in the touch-me-not plant.
- **Sysmonasty**: This is the correct term for the rapid movement of the leaves of the touch-me-not plant in response to touch stimuli. When the leaves are touched, they fold and droop.

4. **Conclusion**: Based on the analysis, the movement of leaves in the touch-me-not plant is classified as **Sysmonasty**.

### Final Answer
The movement of leaves in the touch-me-not plant is **Sysmonasty**.