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Updated: May 22, 2025

Comprehensive Compositional Analysis of Plant Cell Walls Lignocellulosic biomass Part I: Lignin
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Rapid Solidification of Plant Latices from Campanula glomerata Driven by a Sudden Decrease in Hydrostatic Pressure.

Arne Langhoff1, Astrid Peschel1, Christian Leppin1,2

  • 1Institute of Physical Chemistry, Clausthal University of Technology, Arnold-Sommerfeld-Str. 4, 38678 Clausthal-Zellerfeld, Germany.

Plants (Basel, Switzerland)
|March 17, 2025
PubMed
Summary

Plant latex from Campanula glomerata rapidly solidifies due to pressure drop, unlike other latices. This rapid coagulation mechanism, involving liquid-liquid phase separation, differs significantly from slow physical drying processes.

Keywords:
QCM-Dliquid–liquid phase separationplant laticesself-healingsolidification

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Area of Science:

  • Plant biology
  • Materials science
  • Biophysics

Background:

  • Plant latices are complex biological fluids with unique solidification properties.
  • Understanding latex solidification is crucial for applications in natural rubber and biomaterials.
  • Existing knowledge does not fully explain the rapid solidification observed in certain plant latices.

Purpose of the Study:

  • To investigate the rapid solidification mechanism of Campanula glomerata latex.
  • To compare the solidification dynamics of C. glomerata latex with Euphorbia characias and technical latices.
  • To elucidate the role of liquid-liquid phase separation (LLPS) in latex coagulation.

Main Methods:

  • Quartz crystal microbalance with dissipation monitoring (QCM-D) to analyze solidification.
  • Optical video microscopy to observe latex behavior upon plant injury.
  • Cryo-scanning electron microscopy (cryo-SEM) for structural analysis.

Main Results:

  • Campanula glomerata latex solidified significantly faster than Euphorbia characias and technical latices.
  • Rapid solidification is attributed to a pressure drop-induced coagulation, not physical drying.
  • Optical and QCM-D data suggest liquid-liquid phase separation (LLPS) is involved in C. glomerata latex solidification.

Conclusions:

  • A pressure drop mechanism explains the rapid solidification of C. glomerata latex.
  • Liquid-liquid phase separation (LLPS) plays a key role in the observed rapid coagulation.
  • This study reveals a novel solidification pathway for plant-based materials.