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Updated: May 22, 2026

Determination of the Mating Efficiency of Haploids in Saccharomyces cerevisiae
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Published on: December 2, 2022

Yeast survive by hedging their bets.

Robin Meadows1

  • 1robin@nasw.org

Plos Biology
|May 17, 2012
PubMed
Summary

Yeast cells use a bet hedging strategy, varying their growth states even without stress. This variation, linked to trehalose regulation, predicts future stress resistance.

Area of Science:

  • Cellular biology
  • Genetics
  • Biochemistry

Background:

  • Bet hedging is a survival strategy where organisms maintain a diverse range of phenotypes to increase resilience against unpredictable environmental changes.
  • Understanding phenotypic plasticity in clonal populations is crucial for predicting cellular responses to stress.

Purpose of the Study:

  • To investigate the presence and mechanisms of bet hedging in unstressed, clonal yeast cells.
  • To identify molecular markers associated with this bet hedging strategy.
  • To determine if these markers predict future stress resistance.

Main Methods:

  • Utilized a novel experimental approach to monitor and analyze growth states in clonal yeast populations.
  • Quantified gene expression levels, focusing on regulators of trehalose synthesis.

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  • Correlated observed growth states and gene expression with subsequent stress resistance assays.

    • Main Results:

    • Identified a bet hedging strategy in unstressed, clonal yeast cells, characterized by a spectrum of growth states.
    • Demonstrated a correlation between these growth states and the expression of a key trehalose-synthesis regulator.
    • Showcased that this phenotypic variation predicts enhanced resistance to future environmental stresses.

    Conclusions:

    • Unstressed yeast cells actively employ a bet hedging strategy, diversifying their growth states.
    • Trehalose-synthesis regulation is a key molecular component of this bet hedging mechanism.
    • This strategy provides a predictive advantage for surviving future stress events.