Botany Topic 6 notes

Botany Topic 6 notes - 6-1 Topic 6 Plant Cell Walls...

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Unformatted text preview: 6-1 Topic 6 Plant Cell Walls Components of Cell Walls Functions of Cell Walls Provide tensile strength and plasticity Tubes for long distance transport Prevention of water loss Protection from insects and pathogens Vehicle for cell to cell communication Growth and Development Cell division involves synthesis of a new cell wall 6-2 Cell enlargement involves changes in cell wall composition Cell differentiation also involves changes in composition Cell Walls Consist of 3 Layers Middle lamella Primary wall Secondary wall Apoplast versus Symplast Composition: Pectic Acid 6-3 Composition: Pectin Composition: Cellulose Cellulose Microfibrils Micelles Macrofibrils Composition: Hemicellulose 6-4 Cell Expansion Secondary Cell Wall Formation of secondary wall Lignin Primary pit fields Pits and pit pairs Bordered pits Wall Secretions Cutin and cuticle Suberin Tannins ...
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This note was uploaded on 04/08/2008 for the course BIO 29 taught by Professor Mcgowan during the Spring '08 term at CUNY Brooklyn.

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Botany Topic 6 notes - 6-1 Topic 6 Plant Cell Walls...

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