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Phycomyces: A Change in Mechanical Properties after a Light Stimulus ¹

^a Department of Aerospace Engineering Sciences and Mechanical Engineering Department, University of Colorado, Boulder, Colorado 80302

Tensile tests were conducted on the photoresponsive stage IVb sporangiophore of the fungus Phycomyces before and after a saturating light stimulus. The results demonstrate that an increase in the mechanical extensibility of the cell wall occurs after the light stimulus. This increase in mechanical extensibility occurs in the growing zone of the sporangiophore. The majority of this increase occurs in the region about 300 umeters beneath the sporangium.

¹ This work was supported by the National Science Foundation under Grants GB-31039 and GB-35597.

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				R. I. GAMOW and B. BOTTGER Phycomyces: Modification of Spiral Growth after Mechanical Conditioning of the Cell Wall Science, January 19, 1979; 203(4377): 268 - 270. [Abstract] [PDF]