Plant Cell wall structure and function
Plant cell is always surrounded cell by a rigid and protective layer around the plasma membrane which provides the mechanical support to the cell. The cell wall is a non-living structure which is formed by the living protoplast (A plant cell without its cell wall is called a protoplast). It was discovered by R. Hook. In most plant cells, cell wall is made up of cellulose, hemicellulose, pectin and protein. In many fungi, cell wall is formed of chitin and in bacteria it contains protein-lipid-polysaccharide complexes (peptidoglycan).