What is the difference between the primary and secondary walls ?


The difference between the primary and secondary wall are

Primary Wall

1)Extensible layer

2)Dispersed texture of microfibrils


3)Smallest cellulosic unit micelle or microfibril

4)Cellulose 5. 2%

5)Lipid content 5—10%

6)Proteins 5%

7)Hemicellulose 50%

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Secondary Wall

1) Nonextensible layer

2)Parallel texture of microfibrils (to long axis)

3)Smallest cellulosic unit microfibril or fibril


4)Cellulose 50— 94%

5)Normally no lipid

6)Proteins very low

7)Hemicellulose 25%

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