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Science 13 July 1984:
Vol. 225. no. 4658, pp. 232 - 234
DOI: 10.1126/science.11540800
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Articles

Science, Vol 225, Issue 4658, 232-234
Copyright © 1984 by American Association for the Advancement of Science

articles

Neurospora circadian rhythms in space: a reexamination of the endogenous-exogenous question

FM Sulzman, D Ellman, CA Fuller, MC Moore-Ede, and G Wassmer

Department of Biological Sciences, State University of New York, Binghamton 13901, USA.

To test the functioning of circadian rhythms removed from periodicities of the earth's 24-hour rotation, the conidiation rhythm of the fungus Neurospora crassa was monitored in constant darkness during spaceflight. The free-running period of the rhythm was the same in space as on the earth, but there was a marked reduction in the clarity of the rhythm, and apparent arrhythmicity in some tubes. At the current stage of analysis of our results there is insufficient evidence to determine whether the effect seen in space was related to removal from 24-hour periodicities and whether the circadian timekeeping mechanism, or merely its expression, was affected.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Plant circadian rhythms..
C. R. McClung (2006)
PLANT CELL 18, 792-803
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The Spacelab Experience: A Synopsis.
C. R. CHAPPELL and K. KNOTT (1984)
Science 225, 163-165
   Abstract »    PDF »


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