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Magnetite and magnetotaxis in algae.

F F de Araujo, M A Pires, R B Frankel

Biophysical Journal

|May 12, 2009

Summary

This summary is machine-generated.

Magnetotactic algae, Anisonema, were found in a Brazilian mangrove swamp. These algae possess magnetic properties due to chains of magnetite particles within each cell.

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Area of Science:

Microbiology
Biophysics
Geochemistry

Background:

Magnetotactic algae are microorganisms that exhibit a directed movement in response to magnetic fields.
The genus Anisonema, belonging to the Euglenophyceae class, is known for its diverse ecological roles.

Purpose of the Study:

To isolate and characterize magnetotactic algae from a coastal mangrove swamp environment.
To investigate the magnetic properties and cellular structures of Anisonema algae.

Main Methods:

Isolation of microorganisms from mangrove swamp sediments.
Microscopic examination of cellular morphology and internal structures.
Measurement of magnetic dipole moment per cell.

Main Results:

Magnetotactic algae of the genus Anisonema were successfully isolated.
Each algal cell contains numerous magnetite (Fe(3)O(4)) particles arranged in organized chains.
A permanent magnetic dipole moment per cell was quantified at approximately 7 x 10(-10) emu.

Conclusions:

The study confirms the presence of magnetotactic Anisonema algae in northeastern Brazil's coastal mangrove ecosystems.
The findings highlight the role of intracellular magnetite chains in the magnetotactic behavior of these algae.
This research contributes to understanding microbial adaptations in unique environmental settings.