A distinct growth physiology enhances bacterial growth under rapid nutrient fluctuations

Jen Nguyen, Vicente Fernandez, Sammy Pontrelli, Uwe Sauer, Martin Ackermann and Roman Stocker ()
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Jen Nguyen: ETH Zürich
Vicente Fernandez: ETH Zürich
Sammy Pontrelli: ETH Zürich
Uwe Sauer: ETH Zürich
Martin Ackermann: ETH Zürich
Roman Stocker: ETH Zürich

Nature Communications, 2021, vol. 12, issue 1, 1-12

Abstract: Abstract It has long been known that bacteria coordinate their physiology with their nutrient environment, yet our current understanding offers little intuition for how bacteria respond to the second-to-minute scale fluctuations in nutrient concentration characteristic of many microbial habitats. To investigate the effects of rapid nutrient fluctuations on bacterial growth, we couple custom microfluidics with single-cell microscopy to quantify the growth rate of E. coli experiencing 30 s to 60 min nutrient fluctuations. Compared to steady environments of equal average concentration, fluctuating environments reduce growth rate by up to 50%. However, measured reductions in growth rate are only 38% of the growth loss predicted from single nutrient shifts. This enhancement derives from the distinct growth response of cells grown in environments that fluctuate rather than shift once. We report an unexpected physiology adapted for growth in nutrient fluctuations and implicate nutrient timescale as a critical environmental parameter beyond nutrient identity and concentration.

Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-23439-8

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DOI: 10.1038/s41467-021-23439-8

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