NTRS - NASA Technical Reports Server

Back to Results
Neurospora circadian rhythms in space - A reexamination of the endogenous-exogenous questionTo 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 the 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.
Document ID
Document Type
Reprint (Version printed in journal)
Sulzman, F. M.
(California Univ. Riverside, CA, United States)
Ellman, D.
(California Univ. Riverside, CA, United States)
Wassmer, G.
(New York, State University Binghamton, NY, United States)
Fuller, C. A.
(California, University Riverside, CA, United States)
Moore-Ede, M.
(Harvard, University Medical School, Boston, MA, United States)
Date Acquired
August 12, 2013
Publication Date
July 13, 1984
Publication Information
Publication: Science
Volume: 225
ISSN: 0036-8075
Subject Category
Life Sciences (General)
Accession Number
Funding Number(s)
Distribution Limits

Available Downloads

There are no available downloads for this record.
No Preview Available