Define water potential. How it is measured?

Explanation

### Step-by-Step Text Solution

1. **Definition of Water Potential**:
Water potential is defined as the potential energy of water in a system compared to pure water, where it is expressed in terms of pressure. It indicates the tendency of water to move from one area to another, and it is influenced by the concentration of solutes and the pressure exerted on the water.

2. **Components of Water Potential**:
Water potential (Ψ) is made up of two main components:
- **Solute Potential (Ψs)**: This component refers to the effect of solute concentration on the overall water potential. The more solute present in a solution, the lower the solute potential (it is always a negative value).
...