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Related Concept Videos

Cellulose and Pectic Polysaccharides01:15

Cellulose and Pectic Polysaccharides

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 Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth.  Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
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Plants have rigid cell walls that are made up of cell wall polysaccharides that mediate cell-cell adhesion. The primary cell walls of plants consist of two independent and interacting polysaccharide networks: a pectin matrix that embeds the second network comprising cellulose and hemicelluloses.
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Microtubules are small hollow tubes in eukaryotic cells. The cell wall microtubules are polymerized dimers of two globular proteins, α-tubulin and β-tubulin, two globular proteins. With a diameter of about 25 nm, microtubules are the widest components of the cytoskeleton. They help the cell resist compression and provide a track along which vesicles move through the cell or pull replicated chromosomes to opposite ends of a dividing cell. Microtubules go through quick cycles of...
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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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The organs in a multicellular organism’s body are made up of tissues formed by cells. To work together cohesively, cells must communicate. One way that cells communicate is through direct contact with other cells. The points of contact that connect adjacent cells are called intercellular junctions.
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Updated: Jun 1, 2025

Fluorescent Immunolocalization of Arabinogalactan Proteins and Pectins in the Cell Wall of Plant Tissues
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Understanding pectin cross-linking in plant cell walls.

Irabonosi Obomighie1, Iain J Prentice2, Peter Lewin-Jones3

  • 1Department of Biosciences and Durham Centre for Crop Improvement Technology, Durham University, Durham, UK.

Communications Biology
|January 17, 2025
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Summary
This summary is machine-generated.

This study reveals a new "zipper" model for pectin cross-linking in plant cell walls, challenging the old "egg-box" model. This finding impacts our understanding of cell wall structure and agricultural biotechnology applications.

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Area of Science:

  • Plant Biology
  • Biochemistry
  • Biophysics

Background:

  • Pectin is a key plant cell wall component.
  • Pectin cross-linking influences cell wall strength and porosity.
  • Molecular-level understanding of pectin cross-linking is lacking.

Purpose of the Study:

  • To elucidate the mechanism of pectin cross-linking.
  • To determine the effect of pectin cross-linking on cell wall porosity.
  • To challenge existing models of pectin cross-linking.

Main Methods:

  • Multidisciplinary approach combining molecular dynamics simulations.
  • Experimental investigations.
  • Mathematical modelling.

Main Results:

  • A
  • zipper
  • model for pectin cross-linking is favored over the
  • egg-box
  • model.
  • Pectin cross-linking significantly impacts cell wall porosity.
  • Advanced understanding of pectin's role in cell wall mechanics.

Conclusions:

  • The
  • zipper
  • model provides a new framework for pectin cross-linking.
  • Findings advance fundamental knowledge of plant cell wall structure and function.
  • Implications for agricultural biotechnology, crop resilience, and biofuel extraction.