Gene Expression Changes in Cyclic Functions

  • Lawrence S. Dillon

Abstract

Cyclic changes in behavior or activity on the part of eukaryotes in general, correlated to the oscillations in light, temperature, and other variables that characterize the planet on which they live, have become an extremely important area for investigation during the post-1950 period. Circadian and photoperiodic changes related to the day-night pattern have proven especially fertile fields, but infradian (several cycles per day), lunar, and circannual ones have also been productive. A large majority of the investigations have been descriptive of physiological state variations at the organismic level and thus provide only indirect clues that alterations in gene function govern the activities; nevertheless, such studies do serve to reveal the great abundance and wide divergence in character of biorhythms, or chronobiological phenomena, as cyclic behavior has become termed. Nearly all the important life functions have proven to be rhythmic in character, including cell division (Scheving and Pauly, 1973), diapause, energy metabolism, reproduction, sleeping and waking, feeding, types of nutrients consumed, and even the manner of death in man as suicide, coronary disease, and stroke (Kripke, 1974; Reinberg, 1974; Rutledge, 1974; Gorski et al., 1975; Sachsenmaier, 1976; Wever, 1979). But many of lesser importance, such as otolith formation in fish (Barkman, 1978; Dunkelberger et al., 1980; Mugiya et al., 1981), and auditory brain stem response in man (Marshall and Donchin, 1981), also have proven to be rhythmic in occurrence on a daily basis.

Keywords

Estrogen Pyrimidine Thymidine Maltose Pyrophosphate 

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References

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Copyright information

© Springer Science+Business Media New York 1983

Authors and Affiliations

  • Lawrence S. Dillon
    • 1
  1. 1.Texas A & M UniversityCollege StationUSA

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