Identify the incorrect statement about ABA growth regulator

Options

A. It increases the tolerance of plants against different stresses
B. It acts as general plant growth inhibitor and inhibitor of metabolism
C. It helps in seed maturation and dormancy
D. It promotes morphogenesis and differentiation of shoots.

Answer

To identify the incorrect statement about the plant growth regulator abscisic acid (ABA), we will analyze each of the provided statements one by one.

### Step-by-Step Solution:

1. **Statement Analysis**:
- **Statement 1**: "It increases the tolerance of plants against different stresses."
- **Analysis**: This statement is true. ABA is known as the stress hormone because it helps plants cope with stress conditions, such as drought, by promoting stomatal closure to reduce water loss.

2. **Statement 2**: "It acts as a general plant growth inhibitor and inhibitor of metabolism."
- **Analysis**: This statement is also true. ABA functions primarily as a growth inhibitor, slowing down growth and metabolism under certain conditions, particularly during stress.

3. **Statement 3**: "It helps in seed maturation and dormancy."
- **Analysis**: This statement is true as well. ABA plays a crucial role in seed maturation and promotes seed dormancy, ensuring seeds remain inactive until conditions are favorable for germination.

4. **Statement 4**: "It promotes morphogenesis and differentiation of shoots."
- **Analysis**: This statement is incorrect. ABA does not promote morphogenesis and differentiation of shoots; instead, auxins and cytokinins are the hormones responsible for these processes. ABA primarily inhibits growth and is not involved in promoting shoot differentiation.

### Conclusion:
The incorrect statement about ABA is: **"It promotes morphogenesis and differentiation of shoots."**

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