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Does resource availability help determine the evolutionary route to multicellularity?

Olivier Hamant1, Ramray Bhat2, Vidyanand Nanjundiah3

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PubMed
Summary
This summary is machine-generated.

Genetic homogeneity suits multicellular life, while heterogeneity persists in tumors and simpler organisms dependent on external resources. This suggests early multicellularity may have arisen from polyclonal development.

Keywords:
ecologygenetic heterogeneitymulticellularity

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Area of Science:

  • Evolutionary developmental biology (eco-evo-devo)
  • Population genetics
  • Developmental biology

Background:

  • Genetic heterogeneity and homogeneity confer distinct adaptive advantages and bottlenecks.
  • Populations are typically genetically heterogeneous, whereas most multicellular metazoans are genetically homogeneous.

Purpose of the Study:

  • To propose a link between resource availability and developmental strategies (monoclonal vs. polyclonal).
  • To explore the evolutionary origins of multicellularity through an eco-evo-devo lens.

Main Methods:

  • Comparative analysis of genetic strategies in different biological systems.
  • Ecological and evolutionary developmental biology framework.

Main Results:

  • Resource scarcity promotes genetic heterogeneity in populations.
  • Monoclonal development aligns with the stable, resource-rich internal environment of complex multicellular bodies.
  • Polyclonal development is observed in tumors and certain metazoans with greater external resource dependence.

Conclusions:

  • Complex multicellularity favors genetic homogeneity due to internal resource stability.
  • Polyclonal development's persistence in tumors and simpler metazoans reflects their reliance on external resources.
  • Early multicellularity likely originated from polyclonal development in less shielded ancestral metazoans.