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Related Concept Videos

Plant Cell Wall02:43

Plant Cell Wall

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.Collenchyma and sclerenchyma cells, on the other hand, mainly occur in the outer layers of a plant's stems and leaves. These cells provide the plant with strength and support by either partially thickening their primary cell wall (i.e., collenchyma), or depositing a...
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Cellulose and Pectic Polysaccharides01:15

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Role of Microtubules in Cell Wall Deposition01:02

Role of Microtubules in Cell Wall Deposition

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 disassembly and...
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AFM-based Mapping of the Elastic Properties of Cell Walls: at Tissue, Cellular, and Subcellular Resolutions
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Published on: July 24, 2014

Auxin-induced Changes in Avena Coleoptile Cell Wall Composition.

W Loescher1, D J Nevins

  • 1Department of Botany and Plant Pathology, Iowa State University, Ames, Iowa 50010.

Plant Physiology
|November 1, 1972
PubMed
Summary
This summary is machine-generated.

Plant cell wall synthesis is crucial for growth. Auxin, a plant hormone, promotes growth by decreasing non-cellulosic glucose in oat coleoptiles, suggesting a key role in cell elongation.

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Area of Science:

  • Plant Biology
  • Biochemistry

Background:

  • Plant cell walls are essential for growth and development.
  • Auxin is a key plant hormone regulating various growth processes.

Purpose of the Study:

  • To investigate the role of auxin in oat coleoptile cell wall synthesis and elongation.
  • To understand the relationship between glucose availability and auxin-mediated growth.

Main Methods:

  • Hydrolysis of oat coleoptile wall polysaccharides using acids or enzymes.
  • Analysis of hydrolysis products (alditol acetates) via gas chromatography.
  • Time-course studies of auxin-promoted changes in wall fractions under varying glucose conditions.

Main Results:

  • Exogenous glucose availability correlated with cell wall synthesis and coleoptile elongation.
  • Without glucose, auxin promoted a decrease in non-cellulosic glucose and overall wall weight.
  • Auxin-induced reduction in non-cellulosic glucose occurred independently of other wall components.

Conclusions:

  • Auxin-promoted decrease in non-cellulosic glucose is a potential mechanism for plant cell elongation.
  • Glucose availability is critical for auxin's role in cell wall expansion.