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Fragkopoulos, Alexandros ; Vachier, Jérémy ; Frey, Johannes ; Le Menn, Flora-Maud ; Mazza, Marco G. ; Wilczek, Michael ; Zwicker, David ; Bäumchen, Oliver:
Self-generated oxygen gradients control collective aggregation of photosynthetic microbes.
In: Interface : Journal of the Royal Society.
Bd. 18
(2021)
Heft 185
.
- 20210553.
ISSN 1742-5662
DOI: https://doi.org/10.1098/rsif.2021.0553
Abstract
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.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten Fakultäten > Fakultät für Mathematik, Physik und Informatik Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Experimentalphysik V Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Experimentalphysik V > Lehrstuhl Experimentalphysik V - Univ.-Prof. Dr. Oliver Bäumchen |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik 500 Naturwissenschaften und Mathematik > 530 Physik |
| Eingestellt am: | 02 Dec 2021 09:05 |
| Letzte Änderung: | 04 Okt 2023 13:17 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/68064 |