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How stress selects for reversible phenotypic plasticity.

W Gabriel1

  • 1Evolutionary Ecology, Department of Biology II, Ludwig-Maximilians-University Munich, Planegg-Martinsried, Germany. wilfried.gabriel@lmu.de

Journal of Evolutionary Biology
|July 22, 2005
PubMed
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Organisms under short-term stress evolve reversible phenotypic plasticity for faster responses. This adaptability enhances survival by optimizing how organisms adjust to changing environments.

Area of Science:

  • Evolutionary Biology
  • Genetics
  • Environmental Science

Background:

  • Short-term stress periods favor reversible phenotypic plasticity.
  • Reliable stress cues and minimal response delays are crucial for survival.
  • Genotypic adaptation relies on producing adaptive reversible plastic phenotypes.

Purpose of the Study:

  • To calculate the selective advantage of genotypes producing adaptive reversible plastic phenotypes.
  • To determine optimal environmental tolerance functions for stress-induced and non-induced states.
  • To analyze the influence of various environmental and organismal factors on phenotypic plasticity.

Main Methods:

  • Utilized the concept of environmental tolerance to model selective advantages.
  • Derived analytic expressions for optimal mode and breadth of tolerance functions.

Related Experiment Videos

  • Considered factors including stress period length, response delays, stress intensity, environmental variation, and information availability.

    • Main Results:

    • Identified key parameters influencing optimal phenotypic plasticity: stress duration, response delays, stress intensity, environmental variability, and information completeness.
    • Demonstrated that reversible plasticity in both the mode and breadth of tolerance functions most likely impacts fitness.
    • Provided a quantitative framework for understanding adaptive reversible phenotypic plasticity.

    Conclusions:

    • Reversible phenotypic plasticity is strongly selected for under short-term stress.
    • Optimal adaptation involves simultaneous adjustments in the mode and breadth of environmental tolerance.
    • Understanding these dynamics is key to predicting organismal responses to fluctuating environments.