Boron is not required for :

Options

A. Pollen germination
B. Photolysis of water
C. Sugar translocation
D. Uptake and utilisation of `Cat^(++)` ions

Answer

### Step-by-Step Solution:

1. **Understanding the Role of Boron**:
- Boron is classified as a micronutrient essential for plant growth and development. It plays a significant role in various physiological processes within the plant.

2. **Analyzing the Options**:
- The question provides four options regarding the processes for which boron is not required:
1. Pollen germination
2. Photolysis of water
3. Sugar translocation
4. Uptake and utilization of calcium ions

3. **Evaluating Each Option**:
- **Pollen Germination**: Boron is known to be crucial for pollen germination, as it aids in the formation of the pollen tube.
- **Photolysis of Water**: This process involves the splitting of water molecules during photosynthesis to release oxygen. It primarily requires magnesium and is not dependent on boron.
- **Sugar Translocation**: Boron facilitates the formation of sugar complexes, which are essential for the translocation of sugars from leaves to other parts of the plant.
- **Uptake and Utilization of Calcium Ions**: Boron enhances the uptake of calcium ions, making it important for this process.

4. **Identifying the Correct Answer**:
- Since boron is not required for the photolysis of water, the correct answer to the question is **Photolysis of Water**.

### Final Answer:
Boron is not required for **Photolysis of Water**.

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