In the root nodules of Myrica, symbiotic nitrogen fixing organism is

Options

A. Rhizobium
B. Nostoc
C. Frankia
D. Anabaena

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the symbiotic nitrogen-fixing organism found in the root nodules of Myrica.

2. **Identifying Symbiotic Nitrogen Fixers**: There are several known symbiotic nitrogen-fixing organisms, including Rhizobium, Frankia, Nostoc, and Anabaena. It is important to know which of these organisms is associated with Myrica.

3. **Analyzing Each Option**:
- **Rhizobium**: This organism is commonly associated with legumes, such as sweet peas, and is not found in Myrica.
- **Frankia**: This is a nitrogen-fixing actinobacterium that forms symbiotic relationships with non-leguminous plants, including Myrica.
- **Nostoc**: This is a cyanobacterium that is often found in lichens and is not associated with Myrica.
- **Anabaena**: This is another type of cyanobacterium that is typically found in association with ferns and is not related to Myrica.

4. **Conclusion**: Based on the analysis, the symbiotic nitrogen-fixing organism found in the root nodules of Myrica is **Frankia**.

**Final Answer**: The symbiotic nitrogen-fixing organism in the root nodules of Myrica is **Frankia**.

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