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Self-generated oxygen gradients control collective aggregation of photosynthetic microbes
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- Fragkopoulos, Alexandros A. (author)
- Max Planck Inst Dynam & Self Org MPIDS, Am Fassberg 17, D-37077 Gottingen, Germany.
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- Vachier, Jérémy (author)
- Stockholms universitet,Nordiska institutet för teoretisk fysik (Nordita),Max Planck Institute for Dynamics and Self-Organization (MPIDS), Germany,Nordita SU ; Max Planck Inst Dynam & Self Org MPIDS, Am Fassberg 17, D-37077 Gottingen, Germany
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- Frey, Johannes (author)
- Max Planck Inst Dynam & Self Org MPIDS, Am Fassberg 17, D-37077 Gottingen, Germany.
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- Max Planck Inst Dynam & Self Org MPIDS, Am Fassberg 17, D-37077 Gottingen, Germany Nordiska institutet för teoretisk fysik (Nordita) (creator_code:org_t)
- 2021-12
- 2021
- English.
- In: Journal of the Royal Society Interface. - : ROYAL SOC. - 1742-5689 .- 1742-5662. ; 18:185
- Journal article (peer-reviewed)
Abstract
Subject headings
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- For billions of years, photosynthetic microbes have evolved under the variable exposure to sunlight in diverse ecosystems and microhabitats all over our planet. Their abilities to dynamically respond to alterations of the luminous intensity, including phototaxis, surface association and diurnal cell cycles, are pivotal for their survival. If these strategies fail in the absence of light, the microbes can still sustain essential metabolic functionalities and motility by switching their energy production from photosynthesis to oxygen respiration. For suspensions of motile C. reinhardtii cells above a critical density, we demonstrate that this switch reversibly controls collective microbial aggregation. Aerobic respiration dominates over photosynthesis in conditions of low light, which causes the microbial motility to sensitively depend on the local availability of oxygen. For dense microbial populations in self-generated oxygen gradients, microfluidic experiments and continuum theory based on a reaction-diffusion mechanism show that oxygen-regulated motility enables the collective emergence of highly localized regions of high and low cell densities.
Subject headings
- NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
- NATURVETENSKAP -- Biologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences (hsv//eng)
Keyword
- microbial motility
- photosynthesis
- oxygen respiration
- collective effects
- living active matter
Publication and Content Type
- ref (subject category)
- art (subject category)
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