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Locomotive Mechanism of Physarum Plasmodia based on Spatiotemporal Analysis of Protoplasmic Streaming

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Title: Locomotive Mechanism of Physarum Plasmodia based on Spatiotemporal Analysis of Protoplasmic Streaming
Other Titles: Locomotive mechanism of an amoeba
Authors: Matsumoto, Kenji Browse this author
Takagi, Seiji Browse this author
Nakagaki, Toshiyuki Browse this author
Keywords: amoeboid movement
cellular rhythm
migration
visualization
soft matter
Issue Date: 1-Apr-2008
Publisher: Biophysical Society
Journal Title: Biophysical Journal
Volume: 94
Issue: 7
Start Page: 2492
End Page: 2504
Publisher DOI: 10.1529/biophysj.107.113050
Abstract: We investigate how an amoeba mechanically moves its own center of gravity using the model organism Physarum plasmodium. Time-dependent velocity fields of protoplasmic streaming over the whole plasmodia were measured with a particle image velocimetry program developed for this work. Combining these data with measurements of the simultaneous movements of the plasmodia revealed a simple physical mechanism of locomotion. The shuttle streaming of the protoplasm was not truly symmetric due to the peristalsis-like movements of the plasmodium. This asymmetry meant that the transport capacity of the stream was not equal in both directions, and a net forward displacement of the center of gravity resulted. The generality of this as a mechanism for amoeboid locomotion is discussed.
Type: article (author version)
URI: http://hdl.handle.net/2115/34763
Appears in Collections:電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 中垣 俊之

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