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Replaying the evolution of multicellularity.

Or Shalev1, Xiaozhou Ye1, Christoph Ratzke1

  • 1Interfaculty Institute for Microbiology and Infection Medicine Tübingen (IMIT), Cluster of Excellence EXC 2124 'Controlling Microbes to Fight Infections' (CMFI), University of Tübingen, Calwerstrasse 7/1, 72076 Tübingen, Germany.

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|August 16, 2023
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Summary
This summary is machine-generated.

Scientists observed single-celled yeast evolving into multicellular forms in the lab. This research sheds light on the evolutionary transition from unicellular to multicellular life on Earth.

Keywords:
evolutionmulti-level selectionmulticellularityyeast

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Area of Science:

  • Evolutionary biology
  • Cell biology
  • Origins of life

Background:

  • Early life on Earth was exclusively unicellular.
  • The transition to multicellularity was a pivotal event in life's history.
  • Understanding this transition is key to understanding life's development.

Purpose of the Study:

  • To experimentally investigate the evolutionary process of multicellularity.
  • To observe how unicellular organisms can form multicellular aggregates.
  • To gain insights into the mechanisms driving the evolution of multicellular life.

Main Methods:

  • Utilized laboratory evolution experiments.
  • Observed the behavior of single-celled yeast (Saccharomyces cerevisiae).
  • Monitored the formation of large multicellular aggregates over time.

Main Results:

  • Single-celled yeast successfully evolved into multicellular forms.
  • Observable formation of large, stable multicellular aggregates was documented.
  • The study provides a model for studying early multicellular evolution.

Conclusions:

  • Laboratory evolution can recapitulate key steps in the origin of multicellularity.
  • Yeast serves as a tractable model for studying the evolution of multicellularity.
  • This research offers a window into a critical transition in the history of life.