Spontaneous switching of frequency-locking by periodic stimulus in oscillators of plasmodium of the true slime mold

Takamatsu, Atsuko; Yamamoto, Takatoki; Fujii, Teruo

doi:10.1016/j.biosystems.2004.05.008

Cited by 8 publications

(5 citation statements)

References 25 publications

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“…Several researchers have observed that the plasmodium is able to spontaneously change its behaviour pattern against external stimuli to overcome unfavourable conditions [37,38,39]. For example, Takamatsu found that if the plasmodium is entrained to oscillate at a fixed frequency by external periodicallychanging stimulus, it spontaneously deviates from the frequency after a certain period even if the stimulus is maintained.…”

Section: Coordination and The Pragmatic Versatility Of Computational mentioning

confidence: 99%

“…For example, Takamatsu found that if the plasmodium is entrained to oscillate at a fixed frequency by external periodicallychanging stimulus, it spontaneously deviates from the frequency after a certain period even if the stimulus is maintained. She speculated that such spontaneous change might stem from multistability or chaotic behaviour of the plasmodium's dynamics and may contribute to the diversity of behavioural modes of the plasmodium, such as food-searching mode and feeding mode [39].…”

Section: Coordination and The Pragmatic Versatility Of Computational mentioning

confidence: 99%

See 1 more Smart Citation

The Phi-Bot: A Robot Controlled by a Slime Mould

Tsuda

Artmann

Zauner

2009

Artificial Life Models in Hardware

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Section: Coordination and The Pragmatic Versatility Of Computational mentioning

confidence: 99%

Section: Coordination and The Pragmatic Versatility Of Computational mentioning

confidence: 99%

The Phi-Bot: A Robot Controlled by a Slime Mould

Tsuda

Artmann

Zauner

2009

Artificial Life Models in Hardware

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“…Thus, the temperature was often used as an external stimulus as it was much easier to control than chemicals and less harmful than light. Temperature variations affects the contraction cycles (159,195,196,197,198,199,200): high temperature increases the contraction frequency, relaxes tensile forces (201), resulting in positive taxis (195). A power-law is proposed for the dependence of the contraction frequency f on the temperature T , in the form f (T ) ∝ (T − T0) b , with T0 = 273 K and b = 0.66, (199).…”

Section: Chemotaxismentioning

confidence: 99%

A hydro-osmotic coarsening theory of biological cavity formation

Verge-Serandour

Turlier

2020

Preprint

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The blastocoel is a fluid-filled cavity characterizing early embryos at blastula stage. It is commonly described as the result of cell division patterning, but in tightly compacted embryos the mechanism underlying its emergence remains unclear. Based on experimental observations, we discuss an alternative physical model by which a single cavity forms by growth and coarsening of myriad of micrometric lumens interconnected through the intercellular space. Considering explicitly ion and fluid exchanges, we find that cavity formation is primarily controlled by hydraulic fluxes, with a minor influence of osmotic heterogeneities on the dynamics. Performing extensive numerical simulations on 1-dimensional chains of lumens, we show that coarsening is self-similar with a dynamic scaling exponent reminiscent of dewetting films over a large range of ion and water permeability values. Adding active pumping of ions to account for lumen growth largely enriches the dynamics: it prevents from collective collapse and leads to the emergence of a novel coalescence-dominated regime exhibiting a distinct scaling law. Finally, we prove that a spatial bias in pumping may be sufficient to position the final cavity, delineating hence a novel mode of symmetry breaking for tissue patterning. Providing generic testable predictions our hydro-osmotic coarsening theory highlights the essential roles of hydraulic and osmotic flows in development, with expected applications in early embryogenesis and lumenogenesis.

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“…Temperature [17,18] and light [19,20] have also been found to act as stimulants that trigger organism-wide restructuring of the transport networks' morphology. In fact, the cytoplasmic flows themselves serve as the medium by which stimuli pervade the organism [21].…”

Section: Introductionmentioning

confidence: 99%

“…A variety of chemical stimuli have been discussed for P. polycephalum, with glucose being a prominent attractant and salts like NaCl being effective repellants [14][15][16]. Temperature [17,18] and light [19,20] have also been found to act as stimulants that trigger organismwide restructuring of the transport networks' morphology. In fact, the cytoplasmic flows themselves serve as the medium by which stimuli pervade the organism [21].…”

Section: Introductionmentioning

confidence: 99%

Spatial mapping reveals multi-step pattern of wound healing inPhysarum polycephalum

Bäuerle

Kramar

Alim

2017

J. Phys. D: Appl. Phys.

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Wounding is a severe impairment of function, especially for an exposed organism like the network-forming true slime mould Physarum polycephalum. The tubular network making up the organism's body plan is entirely interconnected and shares a common cytoplasm. Oscillatory contractions of the enclosing tube walls drive the shuttle streaming of the cytoplasm. Cytoplasmic flows underlie the reorganization of the network for example by movement toward attractive stimuli or away from repellants. Here, we follow the reorganization of P. polycephalum networks after severe wounding. Spatial mapping of the contraction changes in response to wounding reveal a multi-step pattern. Phases of increased activity alternate with cessation of contractions and stalling of flows, giving rise to coordinated transport and growth at the severing site. Overall, severing surprisingly acts like an attractive stimulus enabling healing of severed tubes. The reproducible cessation of contractions arising during this wound-healing response may open up new venues to investigate the biochemical wiring underlying P. polycephalum's complex behaviours.Submitted to: J. Phys. D: Appl. Phys.

show abstract

Spontaneous switching of frequency-locking by periodic stimulus in oscillators of plasmodium of the true slime mold

Cited by 8 publications

References 25 publications

The Phi-Bot: A Robot Controlled by a Slime Mould

The Phi-Bot: A Robot Controlled by a Slime Mould

A hydro-osmotic coarsening theory of biological cavity formation

Spatial mapping reveals multi-step pattern of wound healing inPhysarum polycephalum

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