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Science 25 April 1969:
Vol. 164. no. 3878, pp. 427 - 428
DOI: 10.1126/science.164.3878.427
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Articles

Phycomyces: Stimulus Storage in Light-Initiated Reactions

Thomas G. Ebrey 1 and R. K. Clayton 1

1 Section of Gentetics, Development, and Physiology, Cornell University, Ithaca, New York 14850

The sporangiophores of Phycomyces blakesleeanus, a unicellular fungus, increase their growth rate temporarily when given a symmetric light pulse. When a sporangiophore is cooled until normal growth stops, the light pulse can still be perceived, and, after the sporangiophore is warmed to room temperature, the normal light-growth response is observed. Thus stimulus information can be "stored" at low temperatures in this sensory system.


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