What does this research mean for the field?

Bacteria adapt to varying magnitudes of stress through cost-ordered mutational paths, utilizing low-cost transport blocking under low stress and energetically demanding detoxification and efflux programs under high stress. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To determine how bacteria tailor evolutionary strategies and mutational trajectories when subjected to varying magnitudes of the same environmental stressor.

September 14, 2026EMBO ReportsOpen Access

Selection favors cost-ordered adaptive mutational paths in a stress-magnitude-dependent manner

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Authors

APAnjali V Patil JZJiao Zhao SKSnehal V. Khairnar

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Overview

Adaptive laboratory evolution reveals stress-magnitude-dependent deployment of low-cost versus high-cost defenses in Escherichia coli, indicating that energetic costs govern adaptive paths.

Key Points

To determine how bacteria tailor evolutionary strategies and mutational trajectories when subjected to varying magnitudes of the same environmental stressor.
Conducted adaptive laboratory evolution experiments using Escherichia coli across different concentrations of the oxidative stressor paraquat and diverse genetic backgrounds.
Integrated multi-omics analyses with genome-scale metabolic modeling to calculate parameterized metabolic costs of adaptive mechanisms.
Low paraquat stress selected for the inactivation of a hijacked polyamine influx transporter, maintaining optimal growth with minimal metabolic cost.
High paraquat stress activated energetically costly adaptation programs, including elevated active efflux mechanisms and metabolic detoxification repair systems to overcome severe toxicity.

Cite This Study

Patil et al. (2026) studied this question.

synapsesocial.com/papers/6aa7b3bf0926e14a848b2ebb https://doi.org/10.1038/s44319-026-00933-y

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September 14, 2026EMBO ReportsOpen Access

Selection favors cost-ordered adaptive mutational paths in a stress-magnitude-dependent manner

View Full Paper

Ask AI

Bookmark

Authors

APAnjali V Patil JZJiao Zhao SKSnehal V. Khairnar

Discussion

Member takes

Overview

Adaptive laboratory evolution reveals stress-magnitude-dependent deployment of low-cost versus high-cost defenses in Escherichia coli, indicating that energetic costs govern adaptive paths.

Key Points

To determine how bacteria tailor evolutionary strategies and mutational trajectories when subjected to varying magnitudes of the same environmental stressor.
Conducted adaptive laboratory evolution experiments using Escherichia coli across different concentrations of the oxidative stressor paraquat and diverse genetic backgrounds.
Integrated multi-omics analyses with genome-scale metabolic modeling to calculate parameterized metabolic costs of adaptive mechanisms.
Low paraquat stress selected for the inactivation of a hijacked polyamine influx transporter, maintaining optimal growth with minimal metabolic cost.
High paraquat stress activated energetically costly adaptation programs, including elevated active efflux mechanisms and metabolic detoxification repair systems to overcome severe toxicity.

Cite This Study

Patil et al. (2026) studied this question.

synapsesocial.com/papers/6aa7b3bf0926e14a848b2ebb https://doi.org/10.1038/s44319-026-00933-y

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