what is protoplast fusion ?

Explanation

### Step-by-Step Solution for the Question: What is Protoplast Fusion?

1. **Definition of Protoplast Fusion**: Protoplast fusion is a biotechnological process used primarily in plant science to modify and create new plant species by fusing the protoplasts (the living part of a plant cell without its cell wall) from two different plant species.

2. **Purpose of Protoplast Fusion**: The main purpose of protoplast fusion is to introduce new traits or characteristics into a plant species. This can lead to the development of hybrid plants that possess desirable traits from both parent species.

3. **Extraction of Protoplasts**: The first step in the process is to extract protoplasts from the two different plant species. This is typically done using specific enzymes:
- **Cellulase**: This enzyme breaks down cellulose, which is a major component of the plant cell wall.
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