Cellular Intelligence by Nonlinear Dynamics in a Slime Mold.

粘菌中非线性动力学的细胞智能。

• 批准号: 11837001
• 负责人: UEDA Tetsuo
• 金额: $ 2.24万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11837001/
• 关键词: True slime molds; Maze problem; motile rhythm; phytochrome; action spectra; photomorphogenesis; Physarum polycephalum; cell shape; 記憶現象; 真正粘菌変形体; 代謝ダイナミクス; 細胞骨格; 結合振動子系

The mechanism of higher information processing in a single cellular organism is clarified in terms of nonlinear dynamics in a large amoeboid cell of the Physarum plasmodium.1. Maze-solving : The organism develops veins in a maze in such a way that veins which located initially at dead ends in a maze disappear and those which connect entrance and exit become thick. When there are two pathways, shorter one is selected. Thus, the organism connects the shortest route from entrance to exit.2. Coupling among vein formation and rhythmic contraction : The veins are formed along the phase gradient of the rhythmic contraction which are artificially generated by oscillating the external temperature.3. Size control : The large amoeboid cell fragments into many pieces by exposure to low temperature or by irradiation with light. Action spectroscopy and antagonistic action of red and far red indicate that one of the photoreceptors is phytochrome.4. Time Memory : The effects of low temperature treatment remain in such a way that the total time of exposure is kept constant.

单细胞生物体中的高级信息处理机制在一个大的变形细胞的绒泡菌原生质体的非线性动力学方面澄清。迷宫解决：生物体在迷宫中以这样一种方式发展静脉，即最初位于迷宫中死端的静脉消失，连接入口和出口的静脉变厚。当有两条路径时，选择较短的一条。因此，有机体连接从入口到出口的最短路线。2.脉体形成与韵律收缩的耦合：脉体沿着韵律收缩的相位梯度形成，韵律收缩是通过外界温度的振荡人为产生的.大小控制：通过暴露于低温或用光照射，大型变形虫细胞分裂成许多碎片。通过红外和远红的作用光谱和拮抗作用，说明光敏色素是光感受器之一.时间记忆：低温处理的效果以这样一种方式保持，即暴露的总时间保持恒定。

项目成果

T.Nakagaki: "Moze-solving by an amoeboid organism."Nature. 407. 470-470 (2000)

T.Nakagaki：“变形虫生物体解决老鼠问题。”自然。

古家奨: "形の科学辞典"朝倉書店(印刷中). (2001)

古屋所：《形式科学词典》朝仓书店（目前正在印刷）（2001 年）。

T.Nakagaki: "Interaction between cell shape and contraction pattern in the Physarum plasmodium."Biophys.Chem. 84. 195-204 (2000)

T.Nakagaki：“胞状体和疟原虫收缩模式之间的相互作用。”Biophys.Chem。

T.Nakagaki: "Interaction between cell shape and contraction pattern in the Physarum plasmodium."Biophysical Chemistry. 84. 195-204 (2000)

T.Nakagaki：“胞状体和疟原虫收缩模式之间的相互作用。”生物物理化学。

Y.Kakiuchi: "Light irradiation induces fragmentation of the plasmodium, a novel photo-morphogenesis in the true slime mold Physarum polycephalum : action spectra and evidence for involvement of the phytochrome."Photochemistry and Photobiology. (In press).

Y.Kakiuchi：“光照射诱导疟原虫破碎，这是真正的粘菌多头绒泡菌中的一种新型光形态发生：作用光谱和光敏色素参与的证据。”光化学和光生物学。