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Locomotive Mechanism of Physarum Plasmodia based on Spatiotemporal Analysis of Protoplasmic Streaming
| 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)
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Submitter: 中垣 俊之
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