Which of the following is produced during water stress condition

Options

A. Cytokinin
B. ABA
C. Phytochrome
D. ATPase

Answer

To answer the question "Which of the following is produced during water stress condition?", we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Water Stress Condition**:
- Water stress in plants occurs when there is insufficient water available for normal physiological processes. This can lead to various responses in plants to conserve water.

2. **Analyzing the Options**:
- **Option 1: Cytokinins**:
- Cytokinins are plant hormones that promote cell division and delay senescence (aging) of the plant. They are not produced in response to water stress.
- **Conclusion**: This option is incorrect.

- **Option 2: Abscisic Acid (ABA)**:
- Abscisic acid is a plant hormone that plays a crucial role in the response to stress conditions, including water stress. It helps in closing the stomata to reduce water loss and is indeed produced during water stress.
- **Conclusion**: This option is correct.

- **Option 3: Phytochrome**:
- Phytochromes are photoreceptors that help plants detect light and regulate various developmental processes. They are not related to water stress response.
- **Conclusion**: This option is incorrect.

- **Option 4: ATPase**:
- ATPase is an enzyme that catalyzes the hydrolysis of ATP to ADP. It is not specifically produced in response to water stress.
- **Conclusion**: This option is incorrect.

3. **Final Answer**:
- The correct answer is **Option 2: Abscisic Acid (ABA)**, as it is the hormone produced during water stress conditions to help the plant conserve water.