Block, I. and Briegleb, W. and Wolke, A. (1990) Geotaxis of the Acellular Slime Mold Physarum polycephalum. In: ESA SP-307 (1990)An Actively Regulated Behavior.. ESA. Fourth European Symposium on Life Science Research in Space, 28 May-1 June 1990, Trieste, Italy..
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Gravity is able to influence not only the contraction frequency of the slime mold but also the direction of its locomotion (geotaxis). This behavior allows the organism to find and stay in favorable environmental conditions. Despite many efforts the perception mechanism for the gravistimulus remains unknown. Experiments involving real and simulated weightlessness as well as horizontal turn experiments have shown that the modulation of the contraction frequency is followed by regulation phenomena. The same type of response is performed upon stimulation of the migrating slime mold with light. Experiments indicate that the mitochondria play an important role in changing the contraction rhythm in response to external stimuli. The simultaneous induction of the light and O-g reactions on the fast rotating clinostat lead to a superposition of the two opposite reactions. This mutual influence of the light and gravity reactions on one another are discussed with regard to the role the chondriome plays not only in the regulation of the contraction frequency but also in the perception of the respective stimulus.
|Document Type:||Conference or Workshop Item (Paper)|
|Additional Information:||LIDO-Berichtsjahr=1990, pages=5,|
|Title:||Geotaxis of the Acellular Slime Mold Physarum polycephalum.|
|Journal or Publication Title:||ESA SP-307 (1990)An Actively Regulated Behavior.|
|Series Name:||ESA SP|
|Keywords:||Geotaxis, Physarum polycephalum|
|Event Title:||Fourth European Symposium on Life Science Research in Space, 28 May-1 June 1990, Trieste, Italy.|
|HGF - Research field:||UNSPECIFIED|
|HGF - Program:||other|
|HGF - Program Themes:||other|
|DLR - Research area:||UNSPECIFIED|
|DLR - Program:||no assignment|
|DLR - Research theme (Project):||UNSPECIFIED|
|Institutes and Institutions:||Institute of Aerospace Medicine|
|Deposited By:||elib DLR-Beauftragter|
|Deposited On:||02 Apr 2006|
|Last Modified:||27 Apr 2009 06:16|
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