ABA was discovered during -

Options

A. Mid 1960s
B. Mid 1906
C. Mid 1966
D. Mid 1967

Answer

**Step-by-Step Solution:**

1. **Identify the Subject of the Question**: The question asks about the discovery of ABA, which stands for abscisic acid.

2. **Define ABA**: Abscisic acid is a type of plant growth regulator, which is a simple molecule that plays a crucial role in plant growth and development.

3. **Understand Plant Growth Regulators**: Plant growth regulators (PGRs) are substances that influence plant growth. They can be categorized into two types:
- Plant growth promoters (which stimulate growth)
- Plant growth inhibitors (which inhibit growth).

4. **Classify ABA**: Abscisic acid is classified as a plant growth inhibitor. Its primary functions include promoting plant dormancy and responding to stress conditions in plants.

5. **Determine the Discovery Timeline**: The discovery of abscisic acid occurred in the 1960s.

6. **Conclude the Answer**: Therefore, the correct answer to the question "ABA was discovered during" is the 1960s.

**Final Answer**: ABA was discovered during the 1960s.

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