Caulobacter

Definition

Caulobacter is a genus of gram-negative bacteria within the class Alphaproteobacteria, known for its unique life cycle characterized by asymmetric cell division. It is commonly found in freshwater environments and plays a role in nutrient cycling.

5 Must Know Facts For Your Next Test

1. Caulobacter undergoes a dimorphic life cycle involving a motile swarmer cell and a sessile stalked cell.
2. The genus is well-studied for its cellular differentiation and division mechanisms.
3. Caulobacter crescentus is the most studied species within this genus.
4. It attaches to surfaces using a structure called the holdfast, which is extremely adhesive.
5. Caulobacter species are important model organisms for studying bacterial cell cycles and development.

Review Questions

• What are the two main stages of Caulobacter's life cycle?
• Why is Caulobacter crescentus significant in microbiological research?
• How does Caulobacter attach to surfaces in its environment?

Related terms

Alphaproteobacteria: A class of Proteobacteria that includes many agriculturally and medically important bacteria.

Holdfast: A sticky, adhesive structure used by some bacteria, including Caulobacter, to attach to surfaces.

Bacterial Cell Cycle: The sequence of events in bacterial growth and division, including DNA replication and cytokinesis.