If the requisite period of low temperature treatment is followed by a period of high tem- perature, the expected acceleration of flowering did not occur. This process is known as

Options

A. photophosphorylation
B. dedifferentiation
C. devernalization
D. vernalization

Answer

To answer the question regarding the phenomenon where the expected acceleration of flowering does not occur after a requisite period of low temperature treatment followed by a period of high temperature, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Understanding Vernalization**:
- Vernalization is the process where plants are exposed to low temperatures to induce flowering. This is particularly important for biennial plants, which require a cold period to trigger their flowering process.

2. **Identifying the Temperature Range**:
- The typical temperature range for vernalization is between 5 to 17 degrees Celsius. This range is crucial for the successful induction of flowering in certain plants.

3. **Recognizing the Impact of High Temperature**:
- After the vernalization period, if the plant is exposed to a high temperature, it can disrupt the flowering process. This is because the high temperature can negate the effects of the low temperature treatment.

4. **Defining De-vernalization**:
- The phenomenon where the expected flowering does not occur after the low temperature treatment followed by high temperature is known as de-vernalization. This means that the plant loses its ability to flower due to the subsequent exposure to high temperatures.

5. **Conclusion**:
- Therefore, the correct term for the process described in the question is de-vernalization.

### Final Answer:
The expected acceleration of flowering did not occur due to the high temperature following the requisite low temperature treatment, and this process is known as **de-vernalization**.

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