Leptothrix

Definition

Leptothrix is a genus of filamentous, iron-oxidizing bacteria commonly found in aquatic environments. They are known for their ability to create sheaths encrusted with iron and manganese oxides.

5 Must Know Facts For Your Next Test

1. Leptothrix species are often found in freshwater habitats rich in organic material.
2. These bacteria play a significant role in the biogeochemical cycling of iron and manganese.
3. Leptothrix can form dense mats that can clog water pipes and filtration systems.
4. They thrive in microaerophilic conditions, where oxygen levels are low but not entirely absent.
5. The sheath formation by Leptothrix is a key feature distinguishing them from other similar bacteria.

Review Questions

• What environmental conditions favor the growth of Leptothrix species?
• How do Leptothrix contribute to the biogeochemical cycling of iron and manganese?
• What is a distinguishing feature of Leptothrix that helps identify them?

Related terms

Proteobacteria:

A major phylum of Gram-negative bacteria that includes a wide variety of pathogens.

Sheath Formation: The process by which some filamentous bacteria produce an outer layer or sheath, often encrusted with minerals.

Microaerophilic: Refers to organisms that require oxygen at lower levels than are present in the atmosphere.