Nakagaki T, Yamada H, Ito M
Bio-Mimetic Control Research Centre, The Institute of Physical and Chemical Research (RIKEN), Shimoshidami, Moriyama, Nagoya 463-0003, Japan.
J Theor Biol. 1999 Apr 21;197(4):497-506. doi: 10.1006/jtbi.1998.0890.
The plasmodium of Physarum polycephalum is a large amoeboid organism showing rhythmic contraction everywhere within an organism, and moves by forming spatio-temporal patterns of the rhythmic contraction. We propose a reaction-diffusion-advection model for the pattern formation. This model is constructed under physiological suggestions that the chemical oscillator acts as a clock regulating the rhythmic contraction and interacts spatially not only by diffusion but also by advection of protoplasm. Behavior of the model is studied by numerical calculation, especially the effects of the advection term on a simple reaction-diffusion system. The advection effect reproduces experimentally observed phenomena of fluctuating propagation of the contraction wave. Concept of the reaction-diffusion-advection system is promising for modeling the mechanism of amoeboid behaviour in the Physarum plasmodium. Copyright 1999 Academic Press.
多头绒泡菌的原质团是一种大型变形虫状生物，在其体内各处都表现出有节奏的收缩，并通过形成有节奏收缩的时空模式来移动。我们提出了一个用于模式形成的反应-扩散-平流模型。该模型是在生理学建议的基础上构建的，即化学振荡器充当调节有节奏收缩的时钟，并且不仅通过扩散而且通过原生质的平流在空间上相互作用。通过数值计算研究了该模型的行为，特别是平流项对简单反应-扩散系统的影响。平流效应再现了实验观察到的收缩波波动传播现象。反应-扩散-平流系统的概念对于模拟多头绒泡菌原质团中变形虫行为的机制很有前景。版权所有1999年学术出版社。
