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The plant cell wall gives plant cells shape, support, and protection. As a cell matures, its cell wall specializes according to the cell type. For example, the parenchyma cells of leaves possess only a thin, primary cell wall.
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Cell division is essential for organismal growth and development. In animal cells, the central spindle and its associated proteins form the midbody, a structure that has an essential role in cytokinesis. In plants, the central spindle, along with the microtubules, actin, and other cell components, matures into the phragmoplast, which is necessary for cytokinesis. Unlike the stationary midbody, the phragmoplast expands centrifugally, eventually leading to the formation of the new cell wall.
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Characterizing Mechanical Properties of Primary Cell Wall in Living Plant Organs Using Atomic Force Microscopy
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Characterizing Mechanical Properties of Primary Cell Wall in Living Plant Organs Using Atomic Force Microscopy

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Plant cell walls.

Herman Höfte1, Aline Voxeur1

  • 1Institut Jean-Pierre Bourgin, INRA, Centre National pour la Recherche Scientifique, AgroParisTech, Université Paris-Saclay, RD10, 78026, Versailles Cedex, France.

Current Biology : CB
|September 13, 2017
PubMed
Summary
This summary is machine-generated.

Plant cell walls balance strength and extensibility, enabling large leaf surfaces and diverse shapes. This allows plants to grow, support functions like water transport, and store resources.

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Area of Science:

  • Plant biology
  • Cell wall mechanics
  • Biophysics

Background:

  • Plants utilize a hydrostatic skeleton, requiring high intracellular pressures supported by strong yet extensible cell walls.
  • Balancing tensile strength and extensibility is crucial for cell growth and shape development in all walled organisms.

Purpose of the Study:

  • To explain how plant cells achieve the balance between cell wall strength and extensibility.
  • To explore the mechanisms behind plant cell shape variation and growth.
  • To review the diverse functions of secondary cell walls in plants.

Main Methods:

  • Review of existing literature on plant cell wall structure and mechanics.
  • Analysis of cell wall composition and architecture in various plant cell types.
  • Discussion of experimental and theoretical approaches to study cell wall properties.

Main Results:

  • Plant primary cell walls reconcile high tensile strength (up to 100 MPa) with necessary extensibility for growth.
  • Targeted deposition of wall material and local variations in extensibility drive plant cell shape diversity.
  • Secondary walls are optimized for specific functions, including mechanical support, water transport, solute exchange, and elastic deformation.

Conclusions:

  • Plant cell walls are sophisticated structures enabling significant cell expansion and diverse morphologies.
  • Understanding cell wall dynamics is key to comprehending plant growth, development, and adaptation.
  • Future research should focus on the detailed mechanisms of targeted wall deposition and extensibility control.