plant cell wall components and Composition

plant cell wall components and Composition

1. Cell Wall : Components and Composition

2. What is cell wall ? The cell wall is the tough, usually flexible but sometimes fairly rigid layer that surrounds cells. It is located outside the cell membrane. It’s main function is to provide cells rigidity, strength and protection and also acting as a filtering mechanism.

3. Composition of Plant Cell Wall In the primary plant cell wall, the major carbohydrates are cellulose, hemicellulose and pectin. The outer part of the primary cell wall of the plant cell wall is made of wax and cutin and is known as plant cuticle. The secondary cell wall contains cellulose, xylan , lignin. And one type of hemicellulose .

4. Composition of Plant Cell Wall Cell wall of epidermis, endodermis contain suberin . Plant cell walls also contain enzymes such as hydrolases , esterases , peroxidase and transglysolases . They can also contain mineral substances.

5. Components of Plant Cell Wall Plant cell wall composed of three layers. 1. The middle lamella 2. The primary cell wall 3. The secondary cell wall

6. Plant Cell Wall Structure

7. The Middle Lamella The middle lamella is a  pectin   layer. It  cements the cell walls of two adjoining cells together. It is the first layer formed during cell division.

8. The Primary Cell Wall It is formed after the middle lamella. A thin, flexible and extensible layer . It is formed while the cell is growing. It is composed of pectin compounds, hemicellulose and glycoprotein. The layer consists of a framework of cellulose microfibrils .

9. The Secondary Cell Wall It is extremely rigid and provides strength. It is not found in all cell types. It is composed of cellulose, hemicellulose and lignin.

10. The End