Which of the following is not an application of plant tissue culture?

Options

A. Propagation of a large number of plants in very short durations
B. Changing the ploidy of plant
C. Płoducing plants which are genetically identical to the parent plant
D. Recovery of healthy plants from the diseased plants

Answer

To determine which of the following is not an application of plant tissue culture, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Plant Tissue Culture**:
Plant tissue culture is a technique used to grow plants under sterile conditions on a nutrient culture medium. It has several applications in agriculture and horticulture.

2. **Evaluating the Options**:
- **Option 1**: Propagation of a large number of plants in a very short duration.
- **Analysis**: This is a primary application of plant tissue culture. It allows for rapid multiplication of plants.

- **Option 2**: Changing the ploidy of the plant.
- **Analysis**: This is not typically an application of plant tissue culture. Changing the ploidy can lead to mutations and genetic disorders, which is not the goal of tissue culture.

- **Option 3**: Producing plants that are genetically identical to the parent plant.
- **Analysis**: This is indeed an application of plant tissue culture, as it allows for the production of clones, ensuring that the genetic traits of the parent plant are preserved.

- **Option 4**: Recovery of healthy plants from diseased plants.
- **Analysis**: This is also an application of plant tissue culture. It involves taking healthy tissues from diseased plants and culturing them to produce healthy offspring.

3. **Conclusion**:
After analyzing all the options, it is clear that the second option, "changing the ploidy of the plant," is not an application of plant tissue culture. Therefore, the correct answer is **Option 2**.