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Plant developmental oddities.

Carlo M Pozzi1, Vittoria F Brambilla1, Angelo Gaiti1

  • 1Department of Agricultural and Environmental Sciences, University of Milan, Via Celoria 2, 20133, Milan, Italy.

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Summary
This summary is machine-generated.

Plants without a shoot apical meristem (SAM) develop unique body shapes due to rewiring of developmental genes. Environmental and evolutionary factors drive this loss, influencing plant morphology and reproduction strategies.

Keywords:
BauplanEvolutionary adaptationPhytomerPlant developmentSAM

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Area of Science:

  • Plant developmental biology
  • Evolutionary developmental biology
  • Genetics

Background:

  • The shoot apical meristem (SAM) is crucial for plant growth and development.
  • Some plant families, including Podostemaceae, Lemnaceae, and Gesneriaceae, exhibit absent or altered SAMs.
  • These plants display unique morphologies and alternative reproductive strategies.

Purpose of the Study:

  • To explore plant body development in families lacking a typical SAM.
  • To investigate alternative developmental and reproductive strategies in these plants.
  • To examine gene expression patterns related to SAM formation and function.

Main Methods:

  • Literature review of plant development in selected families.
  • Analysis of alternative reproductive structures (turions, fronds, modified leaves).
  • Review of gene expression studies for SAM-related genes.

Main Results:

  • Plants lacking SAMs develop unique body shapes.
  • Alternative reproductive methods bypass the need for a SAM.
  • Genes involved in SAM formation are expressed in atypical locations, indicating developmental network rewiring.

Conclusions:

  • Loss or reduction of SAM is driven by environmental pressures and evolutionary constraints.
  • Rewiring of developmental genes leads to unique plant morphologies.
  • Further research, including Next-Generation Sequencing, is needed to understand genetic adaptations and environmental influences.