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Please use this identifier to cite or link to this item: http://hdl.handle.net/10445/4399

Title: Locomotive Mechanism of Physarum Plasmodia based on Spatiotemporal Analysis of Protoplasmic Streaming
Authors: Matsumoto, Kenji
Takagi, Seiji
Nakagaki, Toshiyuki
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.
Research Achievement Classification: 原著論文/Original Paper
Type: Journal Article
Peer Review: あり/yes
Solo/Joint Author(s): 共著/joint
Published journal or presented
academic conference: 
Biophysical Journal
Volume: 94
Spage: 2492
Epage: 2504
Date: 2008
Appears in Collections:Nakagaki Toshiyuki

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