A basidiomycete fungus producing uredospores on wheat plant is

Options

A. Ustilago
B. Puccinia
C. Phytophthora
D. Alternaria

Answer

To solve the question, "A basidiomycete fungus producing uredospores on wheat plant is," we can follow these steps:

### Step 1: Understand the Key Terms
- **Basidiomycete**: This is a class of fungi known for producing spores on a structure called a basidium. They are commonly referred to as club fungi.
- **Uredospores**: These are a type of spore produced by certain fungi, particularly rust fungi, during a specific stage of their life cycle.

### Step 2: Identify the Context
- The question specifies that we are looking for a basidiomycete fungus that produces uredospores, which indicates that we are dealing with a type of rust fungus.

### Step 3: Analyze the Options
- **Ustilago**: This is a genus of fungi that causes smut diseases in plants, not rust diseases.
- **Paxinia**: This genus includes rust fungi, which produce uredospores. It is known to cause diseases like stem rust in cereal crops, including wheat.
- **Phytophthora**: This is a genus of water molds, not a basidiomycete, and it is known for causing various plant diseases.
- **Alternaria**: This is a genus of fungi that belongs to the class Deuteromycetes, not basidiomycetes.

### Step 4: Select the Correct Answer
Based on the analysis, the only option that fits the description of a basidiomycete fungus producing uredospores on wheat is **Paxinia**.

### Final Answer
The correct answer is **Paxinia**.

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