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Imaging the Root Hair Morphology of Arabidopsis Seedlings in a Two-layer Microfluidic Platform
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Real-time tracking of root hair nucleus morphodynamics using a microfluidic approach.

Gaurav Singh1, David Pereira2, Stéphanie Baudrey3

  • 1Institut de biologie moléculaire des plantes, CNRS, Université de Strasbourg, Strasbourg, 67084, France.

The Plant Journal : for Cell and Molecular Biology
|September 25, 2021
PubMed
Summary

This study introduces a microfluidic device for high-resolution imaging of Arabidopsis root hairs (RHs). The device allows real-time monitoring of nuclear dynamics, revealing correlations between nuclear shape and migration speed in mature RHs.

Keywords:
Arabidopsis thalianalive cell imagingmicrofluidicsnucleusroot hairsingle celltechnical advance

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Area of Science:

  • Plant biology
  • Cell biology
  • Developmental biology

Background:

  • Root hairs (RHs) are crucial for nutrient uptake and microbe interactions.
  • Their rapid apical growth makes them ideal for studying cellular morphodynamics.
  • Existing live cell imaging lacks the high resolution needed for organelle-level analysis.

Purpose of the Study:

  • To develop a microfluidic device for high-resolution live imaging of Arabidopsis root hair development.
  • To enable real-time monitoring of nuclear movement and shape changes.
  • To investigate the relationship between nuclear morphology and migration in root hairs.

Main Methods:

  • Development of a coverslip-based microfluidic device (CMD).
  • High-resolution confocal imaging of Arabidopsis root hairs.
  • Real-time tracking of nuclear movement, shape, circularity, area, and aspect ratio.

Main Results:

  • The CMD successfully captured typical root hair growth rates and nuclear positioning.
  • Real-time variations in nuclear shape and size were observed during root hair growth.
  • Mature root hairs exhibited higher nuclear aspect ratios correlating with increased nuclear migration speeds.

Conclusions:

  • The microfluidic device provides a powerful tool for high-resolution imaging of root hair development.
  • Nuclear shape changes and migration speeds are linked in mature root hairs.
  • This finding opens avenues for studying mechanical constraints on nuclear dynamics in plant development.