Chloride ions are required for –

Options

A. Splitting of water to liberate oxygen during photosynthesis
B. Pollen germination
C. Carbohydrate Translocation
D. Both (2) & (3)

Answer

**Step-by-Step Solution:**

1. **Understanding the Role of Chloride Ions:**
- Chloride ions (Cl⁻) are classified as micronutrients essential for plant growth and development. They play a significant role in various physiological processes.

2. **Analyzing the Options:**
- The question provides four options regarding the functions of chloride ions:
1. Splitting of water to liberate oxygen during photosynthesis.
2. Pollen germination.
3. Carbohydrate translocation.
4. Both 2 and 3.

3. **Evaluating Option 1:**
- Chloride ions are indeed involved in the process of photosynthesis. They are crucial for the splitting of water molecules (photolysis) which releases oxygen. This process occurs in the thylakoid membranes of chloroplasts during the light-dependent reactions of photosynthesis.

4. **Evaluating Option 2:**
- Pollen germination is primarily influenced by boron, another micronutrient, rather than chloride ions. Boron is essential for the development of pollen tubes and successful fertilization.

5. **Evaluating Option 3:**
- Carbohydrate translocation is also not directly associated with chloride ions. This process is mainly facilitated by other nutrients, including boron, which aids in the movement of carbohydrates within the plant.

6. **Conclusion:**
- Based on the evaluations, chloride ions are specifically required for the splitting of water during photosynthesis, making option 1 the correct answer. Options 2 and 3 are incorrect as they are not directly related to chloride ions.

**Final Answer:**
- Chloride ions are required for the splitting of water to liberate oxygen during photosynthesis (Option 1).

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