Which of the following amino acid accumulates in xerophytes in response to stress ?

Options

A. Methionine
B. Alanine
C. Proline
D. Serine

Answer

To solve the question about which amino acid accumulates in xerophytes in response to stress, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Xerophytes**:
- Xerophytes are plants that are adapted to survive in environments with very little water. They have developed various mechanisms to cope with water scarcity.

2. **Identify Stress Response**:
- In response to water stress, xerophytes need to maintain their cellular functions and prevent damage. One of the strategies they use is the accumulation of certain substances.

3. **Recognize the Role of Amino Acids**:
- Amino acids play a crucial role in plant stress responses. They can help stabilize proteins and cellular structures, and they can also act as osmoprotectants.

4. **Focus on Proline**:
- Among the amino acids, proline is well-known for its role in plant stress responses. It accumulates in many plants, including xerophytes, during periods of drought or high salinity.

5. **Conclude the Answer**:
- Based on the understanding of xerophytes and their response to stress, the amino acid that accumulates in xerophytes in response to stress is proline.

### Final Answer:
The amino acid that accumulates in xerophytes in response to stress is **proline**.

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