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Tissue-like multicellular development triggered by mechanical compression in archaea.

Theopi Rados1, Olivia S Leland1, Pedro Escudeiro2

  • 1Brandeis University, Department of Biology, Waltham, MA, USA.

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|April 3, 2025
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Summary
This summary is machine-generated.

Uniaxial compression triggers clonal multicellularity in haloarchaea, forming unique tissue structures. This discovery reveals convergent evolution of multicellularity across life

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Area of Science:

  • Evolutionary biology
  • Microbiology
  • Biophysics

Background:

  • Clonal multicellularity is a rare evolutionary event, observed predominantly in eukaryotes.
  • Archaea have a limited history of developing multicellularity, with only one known instance.
  • Understanding the emergence of multicellularity across different domains of life is crucial.

Purpose of the Study:

  • To investigate the induction of clonal multicellularity in haloarchaea.
  • To characterize the mechanical and molecular properties of archaeal tissues.
  • To explore the potential for convergent evolution in multicellular systems.

Main Methods:

  • Induction of multicellularity via uniaxial compression in haloarchaea.
  • Mechanical and molecular analysis of archaeal tissues.
  • Microscopy and cellular analysis to identify cell types and developmental stages.

Main Results:

  • Uniaxial compression successfully induced clonal multicellularity in haloarchaea, forming tissue-like structures.
  • Archaeal tissues exhibit distinct mechanical and molecular properties compared to unicellular haloarchaea, mimicking eukaryotic features.
  • A tubulin-independent cellularization process, driven by membrane tension at a critical cell size, was observed.
  • Two distinct cell types, peripheral (Per) and central scutoid (Scu) cells, emerged with specialized polarity patterns.

Conclusions:

  • Haloarchaea can form multicellular tissues under specific biophysical conditions (uniaxial compression).
  • The study reveals a potential convergent evolutionary pathway for multicellularity, driven by biophysical mechanisms.
  • These findings challenge the traditional view of multicellularity's exclusivity to eukaryotes and bacteria.