File:Multicellular.png
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Multicellular.png (309 × 311 pixels, file size: 164 KB, MIME type: image/png)
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DescriptionMulticellular.png |
English: Multicellularity was one of the most significant innovations in the history of life, but its initial evolution remains poorly understood. Using experimental evolution, we show that key steps in this transition could have occurred quickly. We subjected the unicellular yeast Saccharomyces cerevisiae to an environment in which we expected multicellularity to be adaptive. We observed the rapid evolution of clustering genotypes that display a novel multicellular life history characterized by reproduction via multicellular propagules, a juvenile phase, and determinate growth. The multicellular clusters are uniclonal, minimizing within-cluster genetic conflicts of interest. Simple among-cell division of labor rapidly evolved. Early multicellular strains were composed of physiologically similar cells, but these subsequently evolved higher rates of programmed cell death (apoptosis), an adaptation that increases propagule production. These results show that key aspects of multicellular complexity, a subject of central importance to biology, can readily evolve from unicellular eukaryotes. |
Date | |
Source | https://www.pnas.org/content/109/5/1595 |
Author | William C. Ratcliff, R. Ford Denison, Mark Borrello, and Michael Travisano |
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current | 19:11, 4 November 2021 | 309 × 311 (164 KB) | Nmedinac (talk | contribs) | Uploaded a work by William C. Ratcliff, R. Ford Denison, Mark Borrello, and Michael Travisano from https://www.pnas.org/content/109/5/1595 with UploadWizard |
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