Prokaryotic Autotrophic Nitrogen Fixing Symbiont

1. Alnus
- The prokaryotic autotrophic nitrogen-fixing symbiont found in Alnus is a type of bacteria known as Frankia.
- Frankia forms a symbiotic relationship with Alnus, a genus of flowering plants commonly known as alder.
- This symbiotic relationship allows Alnus to thrive in nutrient-poor soils by enabling the plant to fix atmospheric nitrogen with the help of Frankia.

2. Cycas
- Cycas, a genus of gymnosperm plants known as cycads, also harbors a prokaryotic autotrophic nitrogen-fixing symbiont.
- The specific nitrogen-fixing bacteria associated with Cycas play a crucial role in providing the plant with a source of nitrogen, which is essential for its growth and development.

3. Cicer
- Cicer, commonly known as chickpea or garbanzo bean, is another plant that forms a symbiotic relationship with a prokaryotic autotrophic nitrogen-fixing symbiont.
- The nitrogen-fixing bacteria associated with Cicer help enhance the plant's nitrogen uptake, ultimately leading to improved growth and productivity.

4. Pisum
- Pisum, which refers to the genus of plants that includes peas, also hosts a prokaryotic autotrophic nitrogen-fixing symbiont.
- The nitrogen-fixing bacteria found in Pisum play a vital role in enriching the soil with nitrogen, contributing to the plant's overall health and productivity.