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Updated: Jun 24, 2026
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AFM-based Mapping of the Elastic Properties of Cell Walls: at Tissue, Cellular, and Subcellular Resolutions
Published on: July 24, 2014
Auxin-induced Changes in Avena Coleoptile Cell Wall Composition
1Department of Botany and Plant Pathology, Iowa State University, Ames, Iowa 50010.
Plant Physiology
|November 1, 1972
Summary
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.
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.
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