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ID 20647
本文ファイル
著者
Tero, Atsushi
Nakagaki, Toshiyuki
キーワード
Physarum polycephalum
mathematical modeling
natural adaptive networks
NDC
生物科学・一般生物学
抄録(英)
We describe here a mathematical model of the adaptive dynamics of a transport network of the true slime mold Physarum polycephalum, an amoeboid organism that exhibits path-finding behavior in a maze. This organism possesses a network of tubular elements, by means of which nutrients and signals circulate through the plasmodium. When the organism is put in a maze, the network changes its shape to connect two exits by the shortest path. This process of path-finding is attributed to an underlying physiological mechanism: a tube thickens as the flux through it increases. The experimental evidence for this is, however, only qualitative. We constructed a mathematical model of the general form of the tube dynamics. Our model contains a key parameter corresponding to the extent of the feedback regulation between the thickness of a tube and the flux through it. We demonstrate the dependence of the behavior of the model on this parameter.
掲載誌名
Journal of Theoretical Biology
244巻
4号
開始ページ
553
終了ページ
564
出版年月日
2007-02-21
出版者
Academic Press Inc Elsevier Science
ISSN
0022-5193
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
Copyright (c) 2006 Elsevier Ltd
関連情報URL
部局名
理学研究科