Beggiatoa

Definition

Beggiatoa is a genus of colorless, filamentous sulfur bacteria found in both freshwater and marine environments. They play a role in the sulfur cycle by oxidizing hydrogen sulfide to sulfate.

5 Must Know Facts For Your Next Test

1. Beggiatoa are part of the class Gammaproteobacteria.
2. They thrive in environments rich in hydrogen sulfide, such as hydrothermal vents and decaying organic matter.
3. These bacteria can perform both autotrophic and heterotrophic metabolism.
4. Beggiatoa form thick mats that are visible to the naked eye due to their filamentous structure.
5. They store sulfur granules intracellularly, which can be seen under a microscope.

Review Questions

• What environmental conditions are optimal for Beggiatoa growth?
• How do Beggiatoa contribute to the sulfur cycle?
• What is a distinctive physical characteristic of Beggiatoa?

Related terms

Gammaproteobacteria: A class of Proteobacteria that includes many well-known bacteria, such as Escherichia coli.

Hydrothermal Vents: Openings in the sea floor from which heated water rich in minerals flows.

Sulfur Cycle: The series of processes by which sulfur moves between rocks, waterways, and living systems.