Water relations do not include/involve

Options

A. Absorption of water by roots
B. Ascent of sap
C. Escape of water vapour from leaves and other aerial parts
D. Conversion inorganic essential elements into organic compounds

Answer

To solve the question "Water relations do not include/involve," we need to analyze the options provided and determine which one does not relate to water relations in plants. Here’s a step-by-step breakdown of the solution:

### Step-by-Step Solution:

1. **Understanding Water Relations**: Water relations in plants primarily involve the movement and management of water within the plant system. This includes processes such as water absorption, transport, and loss.

2. **Identify Key Processes**:
- **Ascent of Sap**: This refers to the upward movement of water and nutrients from the roots to the leaves through the xylem. This process is essential for plant survival and function.
- **Transpiration**: This is the process of water vapor escaping from the leaves and other aerial parts of the plant. It creates a suction pull that aids in the ascent of sap.

3. **Analyzing the Options**:
- **Option 1**: Absorption of water by roots - This is a fundamental aspect of water relations.
- **Option 2**: Ascent of sap - This is directly related to water movement in plants.
- **Option 3**: Escape of water vapor from leaves (transpiration) - This is also a crucial part of water relations.
- **Option 4**: Conversion of inorganic essential elements to organic compounds - This process is not directly related to water relations. While it involves the transport of nutrients, it does not pertain to the movement or management of water.

4. **Conclusion**: After analyzing all the options, it is clear that **Option 4: Conversion of inorganic essential elements to organic compounds** does not involve water relations. Therefore, the correct answer is Option 4.

### Final Answer:
**Option 4: Conversion of inorganic essential elements to organic compounds** does not involve water relations.