The sequence of spore production in Puccinia (wheat rust ) is

Options

A. basidiospores, aedospores, pycniospores and teliospores
B. teliospores, basidiosores, uredospores and pycniospores
C. teliospores, aeciospotes, uredospores and basidiospores
D. aeciospores, uredospores, teliospores, basidiospores and pycniospores

Explanation

To determine the correct sequence of spore production in Puccinia (wheat rust), we need to understand the life cycle of this fungus and the types of spores it produces. Here’s a step-by-step breakdown of the spore production sequence:

### Step-by-Step Solution:

1. **Identify the Types of Spores**: Puccinia produces five types of spores during its life cycle:
- Aeciospores
- Urediospores
- Teliospores
- Basidiospores
- Pycnidiospores

2. **Understand the Life Cycle**: The life cycle of Puccinia involves multiple stages, typically including:
- The formation of aeciospores from the teliospores.
- The aeciospores germinate to produce urediospores.
- Urediospores can then produce more urediospores, continuing the cycle.
- Eventually, the urediospores will lead to the formation of teliospores.
- Teliospores undergo meiosis to produce basidiospores.
- Basidiospores can then lead to the formation of pycnidiospores.

3. **Sequence of Spore Production**: Based on the life cycle, the correct sequence of spore production in Puccinia is:
- Aeciospores → Urediospores → Teliospores → Basidiospores → Pycnidiospores

4. **Conclusion**: The correct answer that represents the sequence of spore production in Puccinia is:
- Aeciospores, Urediospores, Teliospores, Basidiospores, and Pycnidiospores.

### Final Answer:
The sequence of spore production in Puccinia (wheat rust) is:
**Aeciospores → Urediospores → Teliospores → Basidiospores → Pycnidiospores.**

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