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Published on: September 30, 2018
Do seconds make a difference? Investigating strain-specific behavior of yeast in dynamic glucose environments
Luisa Blöbaum1, Markus Bünker1, Julian Schmitz2
1Multiscale Bioengineering, Bielefeld University, Universitätsstr. 25, 33615, Bielefeld, Germany.
Microbial Cell Factories
|May 14, 2026
Summary
Microfluidic single-cell cultivation reveals that yeast strains adapt to rapidly fluctuating glucose levels. Even brief periods of optimal conditions significantly impact growth, highlighting adaptation
Area of Science:
- Microbiology
- Biotechnology
- Cellular Biology
Background:
- Industrial bioproduction involves dynamic cellular environments due to bioreactor heterogeneities.
- Laboratory conditions do not accurately represent real-world bioprocesses, necessitating new methods for strain development.
- Existing scale-down bioreactors lack the temporal resolution to study second-scale environmental dynamics.
Purpose of the Study:
- To investigate the impact of rapid, second-scale environmental fluctuations on microbial producer growth and intracellular parameters.
- To compare the performance and adaptation of three distinct yeast strains under dynamic glucose-limited and -excess conditions.
- To leverage microfluidic single-cell cultivation for high-temporal-resolution analysis of bioprocess-relevant environments.
Main Methods:
- Utilized microfluidic single-cell cultivation systems for dynamic cultivation experiments.
- Applied alternating phases of glucose excess and limitation at the second timescale.
- Monitored and compared growth rates, ATP levels, glycolytic flux, and cell sizes across three yeast strains.
Main Results:
- Decreased glucose availability consistently reduced growth rates, ATP levels, glycolytic flux, and cell size across all strains.
- Yeast cells achieved 50% of maximal growth rate with only 10% of time in optimal glucose conditions.
- Both growth rate and cell size showed adaptation rather than immediate responses to oscillatory glucose supply, with longer favorable exposures shortening adaptation time and increasing performance.
Conclusions:
- Microfluidics offers high temporal resolution for studying cellular responses to dynamic environments.
- Growth rate is a conserved trait, indicating strain robustness, with adaptation being crucial for performance in fluctuating conditions.
- Findings inform the design of single-cell experiments and the development of robust bioprocesses for dynamic environments.
Keywords:
Bioprocess developmentBiosensorsDynamic environmentDynamic microfluidic single-cell cultivationSaccharomyces cerevisiaeScale-downStrain comparisonMore Related Videos
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