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An enhancer trap system to track developmental dynamics in Marchantia polymorpha.

Alan O Marron1, Susanna Sauret-Güeto1, Marius Rebmann1

  • 1Department of Plant Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EA, UK.

The Plant Journal : for Cell and Molecular Biology
|August 16, 2023
PubMed
Summary

Researchers developed an enhancer trap system in the liverwort Marchantia polymorpha, identifying novel cell markers and revealing hidden developmental structures. This tool aids in understanding plant development and regeneration.

Keywords:
GemmaMarchantia polymorphaOil CellRhizoidauxinenhancer trapmargin tissuemeristemsporeling

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Area of Science:

  • Plant Biology
  • Developmental Biology
  • Genetics

Background:

  • Marchantia polymorpha is a valuable model organism due to its simple structure and genetic accessibility.
  • Studying plant development requires precise tools to visualize gene expression patterns.

Purpose of the Study:

  • To create a novel enhancer trap system in Marchantia polymorpha.
  • To identify new molecular markers for studying liverwort development and regeneration.
  • To investigate the role of auxin in early Marchantia development.

Main Methods:

  • Developed a transformation vector with constitutive fluorescent membrane and nuclear markers.
  • Generated an enhancer trap library in Marchantia.
  • Screened for novel marker lines, including those for rhizoids, oil cells, and apical notch structures.
  • Analyzed marker expression in relation to auxin levels and regeneration.

Main Results:

  • Identified novel marker lines for various Marchantia tissues, including rhizoids and oil cells.
  • Discovered a margin tissue surrounding the thallus, correlated with auxin levels.
  • Characterized multiple markers for the apical notch, revealing proximodistal substructures.
  • Observed that auxin influences meristem emergence and sporeling development.

Conclusions:

  • The enhancer trap system is a valuable resource for Marchantia research.
  • New markers provide insights into tissue differentiation and developmental transitions.
  • Auxin plays a critical role in regulating meristem emergence and developmental patterning in Marchantia.