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On electrical correlates of physarum polycephalum spatial activity: Can we see physarum machine in the dark?

Adamatzky, Andrew; Jones, Jeff

Authors



Abstract

Plasmodium of Physarum polycephalum is a single cell visible by unaided eye, which spans sources of nutrients with its protoplasmic network. In a very simple experimental setup we recorded electric potential of the propagating plasmodium. We discovered a complex interplay of short range oscillatory behavior combined with long range, low frequency oscillations which serve to communicate information between different parts of the plasmodium. The plasmodium's response to changing environmental conditions forms basis patterns of electric activity, which are unique indicators of the following events: plasmodium occupies a site, plasmodium functions normally, plasmodium becomes "agitated" due to drying substrate, plasmodium departs a site, and plasmodium forms sclerotium. Using a collective particle approximation of Physarum polycephalum we found matching correlates of electrical potential in computational simulations by measuring local population flux at the node positions, generating trains of high and low frequency oscillatory behavior. Motifs present in these measurements matched the response "grammar" of the plasmodium when encountering new nodes, simulated consumption of nutrients, exposure to simulated hazardous illumination and sclerotium formation. The distributed computation of the particle collective was able to calculate beneficial network structures and sclerotium position by shifting the active growth zone of the simulated plasmodium. The results show future promise for the non-invasive study of the complex dynamical behavior within and health status of living systems. © 2011 World Scientific Publishing Company.

Citation

Adamatzky, A., & Jones, J. (2011). On electrical correlates of physarum polycephalum spatial activity: Can we see physarum machine in the dark?. Biophysical Reviews and Letters, 6(1-2), 29-57. https://doi.org/10.1142/S1793048011001257

Journal Article Type Article
Publication Date Jun 1, 2011
Deposit Date Aug 25, 2015
Publicly Available Date Mar 28, 2024
Journal Biophysical Reviews and Letters
Print ISSN 1793-0480
Publisher World Scientific Publishing
Peer Reviewed Peer Reviewed
Volume 6
Issue 1-2
Pages 29-57
DOI https://doi.org/10.1142/S1793048011001257
Keywords Physarum polycephalum, plasmodium, electric potential, behavior
Public URL https://uwe-repository.worktribe.com/output/966539
Publisher URL http://dx.doi.org/10.1142/S1793048011001257