Environment-dependent morphology in plasmodium of true slime mold Physarum polycephalum and a network growth model
Environment-dependent morphology in plasmodium of true slime mold Physarum polycephalum and a network growth model
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DOI：
10.1016/j.jtbi.2008.09.010
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发表时间：
2009-01-07
影响因子：
2
通讯作者：
Takizawa, Ginjiro
中科院分区：
文献类型：
--
作者：
Takamatsu, Atsuko;Takaba, Eri;Takizawa, Ginjiro
根据环境条件，分支网络的增长模式。对多头绒泡菌（Physarumpolycephalum）原质团进行了研究。令人惊讶的是，这些模式与细菌菌落中的模式相似，尽管生物学机制差异很大。细菌菌落是微生物的集合，其中个体生物具有运动性并通过营养和化学场相互作用。相比之下，原质团是一种巨大的变形虫样多核单细胞生物，形成一个管状结构的网络，原生质通过该网络流动。原质团的细胞运动性是由在部分体中观察到的振荡现象产生的，部分体通过管状结构相互作用。首先对形态学特征进行定量分析，然后抽象出网络生长过程中的局部规则，建立一个简单的网络生长模型。该模型独立于特定系统，其中仅应用两个规则。最后，我们通过与细菌菌落系统的比较，讨论了常见的生物模式形成的机制。(C)2008爱思唯尔有限公司保留所有权利。
Branching network growth patterns, depending on environmental conditions. in plasmodium of true slime mold Physarum polycephalum were investigated. Surprisingly, the patterns resemble those in bacterial colonies even though the biological mechanisms differ greatly. Bacterial colonies are collectives of microorganisms in which individual organisms have motility and interact through nutritious and chemical fields. In contrast, the plasmodium is a giant amoeba-like multinucleated unicellular organism that forms a network of tubular structures through which protoplasm streams. The cell motility of the plasmodium is generated by oscillation phenomena observed in the partial bodies, which interact through the tubular structures. First, we analyze characteristics of the morphology quantitatively, then we abstract local rules governing the growing process to construct a simple network growth model. This model is independent of specific systems, in which only two rules are applied. Finally, we discuss the mechanism of commonly observed biological pattern formations through comparison with the system of bacterial colonies. (C) 2008 Elsevier Ltd. All rights reserved.