Spatial relationships of cells within magnetotactic multicellular aggregates

Abstract:

Magnetotactic multicellular aggregates (MMAs) consist of about 15 to 25 gram-negative cells arranged in a roughly spherical shape with a diameter ranging from 3 to 12.5 µm. MMA cells present many flagella and also organelles called magnetosomes formed by a magnetic crystal enveloped by a membrane. The magnetosomes are arranged in plates and give the organism a net magnetic moment capable of orient it along magnetic field lines. MMAs show a complex magnetotactic behavior that consists of at least two types of movements: a forward movement in the south direction of the magnetic field and a backward movement. The association of these two movements is known as ping-pong movement [1]. As this is a multicellular organism composed of a single cell type, the spatial arrangement of cells, the alignment of the magnetic moment of magnetosomes, and cell communication to co-ordinate flagellar …

Año de publicación:

2003

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