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REPRISAL: mapping lignification dynamics using chemistry, data segmentation, and ratiometric analysis.

Oriane Morel1,2, Cedric Lion1, Godfrey Neutelings1

  • 1Univ. Lille, CNRS, UMR 8576-UGSF-Unité de Glycobiologie Structurale et Fonctionnelle, Lille F 59000, France.

Plant Physiology
|October 23, 2021
PubMed
Summary

REPRISAL is a new method for mapping plant cell wall lignification using fluorescent reporters and AI segmentation. It reveals detailed lignin distribution and proportions in various plant species and cell types.

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Area of Science:

  • Plant Biology
  • Biochemistry
  • Cell Biology

Background:

  • Lignification is crucial for plant cell wall structure and function.
  • Detailed mapping of lignification capacity is essential for understanding plant development and biomass properties.
  • Existing methods lack the resolution and specificity to analyze lignification at the cellular level.

Purpose of the Study:

  • To develop and validate a novel methodology, REPRISAL, for detailed mapping of plant cell wall lignification capacity.
  • To analyze lignification patterns in wild-type and mutant Arabidopsis thaliana, and in other plant species.
  • To demonstrate the versatility of REPRISAL for studying cell wall polymer incorporation.

Main Methods:

  • REPRISAL combines fluorescent triple labeling with monolignol reporters (H*, G*, S*) and bioorthogonal chemistry.
  • An AI-driven segmentation algorithm identifies distinct cell wall zones (cell corners, middle lamella, secondary walls).
  • Ratiometric analysis quantifies monolignol distribution and proportions within these zones.

Main Results:

  • REPRISAL successfully mapped developmental changes in lignification in Arabidopsis interfascicular fibers.
  • The study provided evidence for AtPRX64's role in floral stem lignification using the REPRISAL method.
  • REPRISAL demonstrated applicability across diverse species including poplar, flax, and maize, and for mapping fucose incorporation.

Conclusions:

  • REPRISAL offers a powerful tool for high-resolution spatial analysis of plant cell wall lignification.
  • The methodology facilitates the study of genetic and developmental regulation of lignin biosynthesis.
  • REPRISAL has broad applications in plant science research, from fundamental biology to biomass engineering.