Plant Cell Wall

Plant Cell Wall

Function includes: maintenance of cell shape; creation of cell to cell interface; and intercellular communication.

cellulose-based

is a _____________ covering outside the cell membrane

cellulose, hemicellulose, and pectin

Plant cell wall is mainly composed of _________ ____________ and ___________

Middle lamellae

the outer layer of the cell wall acts as the cement that binds two adjacent cell walls.

pectin

Middle Lamellae is rich in _______.

Primary cell wall

usually elastic with loosely arranged fibrils containing about 20% proteins

microfibrils

Primary cell wall composed of cellulose in the form of _______

Secondary cell wall

is the thicker  and stronger layer.

lignified secondary cell walls provide mechanical strength to plants.

cellulose composition and orientation of microfibrils

The sublayers of the secondary cell wall differ in ____________ and ___________

Xylan

_______ is found in the secondary cell wall

xyloglucan

____________ is found in primary cell wall

Plasmodesmata

holes that allow for nutrients to enter the cell as well as waste to exit the cell

Pectin

help to strengthen the plant and give it the ability to resist compression

Cellulose

a structural carbohydrate and is considered a complex sugar used in both protection and structure

Microfibril

fine fibril or fiber like strand consisting of glycoproteins and cellulose

Lignin

very hard and has considerable strength

Xylan

a type of hemicellulose, a polysaccharide consisting mainly of xylose residue