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Biosystems. 2019 Aug;182:52-58. doi: 10.1016/j.biosystems.2019.103985. Epub 2019 Jun 18.

Biased Lévy-walk pattern in the exploratory behavior of the Physarum plasmodium.

Author information

1
Department of Computer Science, School of Electrical and Computer Engineering, National Defense Academy of Japan, 1-10-20 Hashirimizu, Yokosuka, Kanagawa, 239-8686, Japan. Electronic address: sirakawa@nda.ac.jp.
2
Department of Intelligent Interaction Technologies, Graduate School of Systems and Information Engineering, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki, 386-8567, Japan.
3
Department of Computer Science, School of Electrical and Computer Engineering, National Defense Academy of Japan, 1-10-20 Hashirimizu, Yokosuka, Kanagawa, 239-8686, Japan.

Abstract

The plasmodium of Physarum polycephalum is a unicellular and multinuclear giant amoeba. The plasmodium has the ability to sense and adapt to many kinds of environmental stimuli, and its optimization behavior in closed spaces has been analyzed extensively. However, few studies have tested the behavior of the plasmodium in an open spaces, despite the biological importance of the adaptability of biological entities in such conditions. Accordingly, we established an experimental setup with a very large and strictly homogeneous substrate and observed the long-term exploratory behavior of the plasmodium. As a result, we found that the movement of the plasmodium was consistent with a Lévy-walk, but with anisotropic bias.

KEYWORDS:

Cell motility; Exploration; Large-scale substrate; Lévy-walk; Physarum plasmodium

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