Rate of transpiration is reduced with

Options

A. Rise in temperature
B. Decrease in light intensity
C. Increase in wind velocity
D. Increase in water uptake .

Answer

**Step-by-Step Solution:**

1. **Understanding Transpiration:**
- Transpiration is the process through which plants lose water in the form of water vapor. This process primarily occurs through small openings in the leaves called stomata.

2. **Factors Affecting Transpiration:**
- Several environmental factors influence the rate of transpiration, including temperature, light intensity, humidity, wind velocity, and water availability.

3. **Analyzing the Options:**
- The question asks which factor reduces the rate of transpiration. The options provided are:
a. Rise in temperature
b. Decrease in light intensity
c. Increase in wind velocity
d. Increase in water uptake

4. **Evaluating Each Option:**
- **Rise in Temperature:** Generally increases the rate of transpiration as it raises the energy of water molecules, causing more evaporation.
- **Decrease in Light Intensity:** Reduces the rate of transpiration. Light intensity affects the opening and closing of stomata. Lower light levels lead to stomata closing, which decreases water loss.
- **Increase in Wind Velocity:** Increases transpiration as it removes the moisture-laden air around the stomata, enhancing evaporation.
- **Increase in Water Uptake:** Increases transpiration because more water available for the plant leads to more water vapor being released.

5. **Conclusion:**
- The correct answer is **decrease in light intensity**. This is because lower light levels lead to stomata closing, which reduces the rate of transpiration.