secondary cell wall
Quick Summary
The secondary cell wall is a layer formed inside the primary cell wall after a plant cell has reached its final size and shape. It is often complex and constitutes the majority of the cell wall.1
Key functions and characteristics of secondary cell walls include:
* Mechanical Support: They provide significant structural support to the plant, especially in woody tissues.23
* Composition: While sharing a basic architecture with primary walls (cellulose fibers in a matrix), secondary walls can have different compositions and structures.2
* Lignin: This complex polymer is a major component of secondary walls in wood, adding compressive strength, stiffness, and waterproofing.4
* Rigidity: Unlike the more flexible primary walls, secondary walls are rigid and contribute to the plant's load-bearing capacity.23
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cellMechanical properties of wall layersā¦an additional layer, called the secondary wall. The middle lamella serves as a cementing layer between the primary walls of adjacent cells. The primary wall is the cellulose-containing layer laid down by cells that are dividing and growing. To allow for cell wall expansion during growth, primary walls are thinnerā¦
Read Moreā¦an additional layer, called the secondary wall. The middle lamella serves as a cementing layer between the primary walls of adjacent cells. The primary wall is the cellulose-containing layer laid down by cells that are dividing and growing. To allow for cell wall expansion during growth, primary walls are thinnerā¦
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cell wallMechanical propertiesSecondary cell walls are responsible for most of the plantās mechanical support as well as the mechanical properties prized in wood. In contrast to the permanent stiffness and load-bearing capacity of thick secondary walls, the thin primary walls are capable of serving a structural, supportiveā¦
Read MoreSecondary cell walls are responsible for most of the plantās mechanical support as well as the mechanical properties prized in wood. In contrast to the permanent stiffness and load-bearing capacity of thick secondary walls, the thin primary walls are capable of serving a structural, supportiveā¦
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