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Quorum Sensing Behavior in the Model Unicellular Eukaryote Chlamydomonas reinhardtii.


ABSTRACT: Microbial communities display behavioral changes in response to variable environmental conditions. In some bacteria, motility increases as a function of cell density, allowing for population dispersal before the onset of nutrient scarcity. Utilizing automated particle tracking, we now report on a population-dependent increase in the swimming speeds of the photosynthetic unicellular eukaryotes Chlamydomonas reinhardtii and C. moewussi. Our findings confirm that this acceleration in swimming speed arises as a function of culture density, rather than with age and/or nutrient availability. Furthermore, this phenomenon depends on the synthesis and detection of a low-molecular-weight compound which can be transferred between cultures and stimulates comparable effects across both species, supporting the existence of a conserved phenomenon, not unlike bacterial quorum sensing, among members of this genus. The potential expansion of density-dependent phenomena to a new group of unicellular eukaryotes provides important insight into how microbial populations evolve and regulate "social" behaviors.

SUBMITTER: Folcik AM 

PROVIDER: S-EPMC7644740 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature

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Quorum Sensing Behavior in the Model Unicellular Eukaryote <i>Chlamydomonas reinhardtii</i>.

Folcik Alexandra M AM   Cutshaw Kirstin K   Haire Timothy T   Goode Joseph J   Shah Pooja P   Zaidi Faizan F   Richardson Brianna B   Palmer Andrew A  

iScience 20201021 11


Microbial communities display behavioral changes in response to variable environmental conditions. In some bacteria, motility increases as a function of cell density, allowing for population dispersal before the onset of nutrient scarcity. Utilizing automated particle tracking, we now report on a population-dependent increase in the swimming speeds of the photosynthetic unicellular eukaryotes <i>Chlamydomonas reinhardtii</i> and <i>C. moewussi</i>. Our findings confirm that this acceleration in  ...[more]

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