Frankia

Definition

Frankia is a genus of Gram-positive, filamentous bacteria that form symbiotic relationships with actinorhizal plants. They are known for their ability to fix nitrogen in root nodules, aiding plant growth.

5 Must Know Facts For Your Next Test

1. Frankia forms symbiotic associations with actinorhizal plants, such as alders and bayberries.
2. These bacteria are capable of fixing atmospheric nitrogen into a usable form for the plant.
3. Frankia belongs to the phylum Actinobacteria and exhibits a filamentous structure.
4. They produce vesicles under low oxygen conditions which help in nitrogen fixation.
5. Frankia can be found in soil environments where actinorhizal plants grow.

Review Questions

• What type of relationship does Frankia form with actinorhizal plants?
• How does Frankia benefit its host plant?
• In what phylum is Frankia classified?

Related terms

Actinorhizal Plants: Plants that form symbiotic relationships with nitrogen-fixing bacteria like Frankia.

Nitrogen Fixation:

The process through which atmospheric nitrogen is converted into ammonia or related molecules available to living organisms.

Actinobacteria:

A phylum of Gram-positive bacteria known for their high G+C content in DNA and diverse metabolic capabilities including antibiotic production.