Which spores of Puccinia cause primary infection in wheat plant :-

Options

A. Uredospores
B. Basidiospores
C. Teleutospores
D. Aeciospores

Answer

To answer the question "Which spores of Puccinia cause primary infection in wheat plant?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Context**: Puccinia is a genus of fungi known for causing rust diseases in plants, particularly wheat. The life cycle of Puccinia involves different types of spores.

2. **Identify the Types of Spores**: The spores produced by Puccinia include:
- Urediniospores
- Teliospores
- Basidiospores
- Aeciospores

3. **Determine the Role of Each Spore Type**:
- **Urediniospores**: These are thin-walled spores that are produced during the repeated cycles of infection on the host plant.
- **Teliospores**: These are thick-walled resting spores that survive unfavorable conditions and germinate to produce basidiospores.
- **Basidiospores**: These spores are produced from teliospores and are involved in the sexual reproduction of the fungus.
- **Aeciospores**: These spores are produced in the aecial stage of the fungus and are responsible for the primary infection on the wheat plant.

4. **Identify the Correct Answer**: Based on the information above, the spores that cause the primary infection in wheat plants are the **Aeciospores**.

5. **Conclusion**: Therefore, the correct answer to the question is **Aeciospores**.

### Final Answer:
The spores of Puccinia that cause primary infection in wheat plants are **Aeciospores**.

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