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Introduction to Chronobiology.

Sandra J Kuhlman1, L Michon Craig2, Jeanne F Duffy3

  • 1Department of Biological Sciences, and Center for the Basis of Neural Cognition Carnegie Mellon University, Pittsburgh, Pennsylvania 15213.

Cold Spring Harbor Perspectives in Biology
|October 18, 2017
PubMed
Summary
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Biological clocks, or circadian rhythms, evolved across species to anticipate daily environmental changes, enhancing survival. This review traces the historical development of circadian concepts from early plant observations.

Area of Science:

  • Chronobiology
  • Evolutionary Biology
  • Physiology

Background:

  • Endogenous biological clocks are widespread, found in organisms from cyanobacteria to humans.
  • These internal clocks enable anticipation of daily environmental fluctuations like light and temperature.
  • Anticipating regular environmental rhythms is crucial for optimizing organismal performance and survival.

Observation:

  • The study of biological rhythms dates back to at least the 1700s.
  • Early observations included the daily leaf movements in plants.
  • An astronomer made these initial observations of plant circadian rhythms.

Findings:

  • Circadian concepts and terminology have evolved over centuries.
  • The historical timeline reveals the gradual emergence of our understanding of biological clocks.

Related Experiment Videos

  • This review synthesizes the historical development of key circadian ideas.

    • Implications:

    • Understanding the history of circadian biology provides context for current research.
    • Recognizing the evolutionary significance of biological clocks highlights their fundamental role.
    • The historical perspective aids in appreciating the complexity of internal timekeeping mechanisms.