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Published September 1970 | Published
Journal Article Open

Effects of Cold Periods on the Stimulus-Response System of Phycomyces


The sporangiophores of Phycomyces do not exhibit phototropic responses when growth is arrested reversibly by cooling to 1°C. Unilateral UV stimuli (254 nm) applied during cold periods are stored for at least 2 hr and produce tropic responses away from the light after warm-up. During the cold period dark adaptation proceeds at a rate which decreases with the temperature.

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© 1970 by The Rockefeller University Press. RUP grants the public the non-exclusive right to copy, distribute, or display the Work under a Creative Commons Attribution–Noncommercial–Share Alike 3.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/3.0/ and http://creativecommons.org/licenses/by-nc-sa/3.0/legalcode. Submitted on March 6, 1970. This work was supported in part by grant No. GB-8527 of the National Science Foundation and by a grant from the Stiftung Volkswagenwerk. Dr. Petzuch held a NATO postdoctoral fellowship.

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August 19, 2023
October 17, 2023