The spray of PMA causes

Options

A. Decrease in transpiration
B. Increase in transpiration
C. Increase in absorption
D. Increase in guttation

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks about the effects of spraying PMA (Phenyl Mercuric Acetate) on plants.

2. **Identify PMA's Function**: PMA is known as an antitranspirant. Antitranspirants are substances that reduce the rate of transpiration in plants.

3. **Analyze the Options**:
- **Option 1: Decrease in transpiration**: This is likely correct because antitranspirants work by causing stomata to close, thereby reducing water loss.
- **Option 2: Increase in transpiration**: This option is incorrect because PMA is an antitranspirant, which would not increase transpiration.
- **Option 3: Increase in absorption**: This option is also incorrect. The closing of stomata does not promote increased absorption.
- **Option 4: Increase in Guttation**: Guttation is the secretion of water droplets from plants, which would not occur if stomata are closed. Therefore, this option is incorrect as well.

4. **Conclusion**: The correct answer is **Option 1: Decrease in transpiration**. Spraying PMA causes the stomata to close, leading to a reduction in the rate of transpiration.

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