lignin being firmly associated to cellulose and hemicellulose provides chesion and rigidity to the cell wall parts imparts water impermeability to xylem vessels and prevents microbial attack by acting as a physicochemical barrier
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The following are the importance of lignin:
1.) it provides rigidity to the plant cell wall.
2.) Ensures water impermeability in Xylem vessels thus the xylem vessels are able to transport water.
3.) It also prevent attack by bacteria by acting as a physiochemical barrier.
From the list above we find that lignin is an important component of the cellwallcell wall.
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