1. Cell structure and Function
1.3. Plant Cell
Plant Cell
Dr V Malathi and Mrs Sushumna Rao
The animal and plant cell are fundamentally similar.
However they are some unique components of the plant cell like and used for storage, and a large central vacuole, which are not found in animal cell.
The following are the structures found in plant cells but not animal cells :
- The : is located outside the cell membrane. The cell wall gives shape , support and protect the cell. It consists mainly of cellulose and may also contain lignin , which makes it more rigid. It prevents the cell from absorbing too much water and bursting. It also keeps large, damaging molecules out of the cell.
- The large is surrounded by its own membrane and contains water and dissolved substances. Its primary role is to maintain pressure against the inside of the cell wall, giving the cell shape and helping to support the plant.
- Plastids are membrane-bound organelles with their own DNA. Examples are chloroplasts and chromoplasts. Chloroplasts contain the green pigment chlorophyll and carry out photosynthesis. make and store other pigments. They give flower petals their bright colors.
We will study in detail these structures in the cell organelles chapter
Watch this interesting video taking us through an virtual tour inside the leaf
“Travel Deep Inside a Leaf – Annotated Version” by California Academy of Sciences is licensed under CC BY 4.0
The cell wall is a structure external to the plasma membrane . The cell wall is a rigid covering that protects the cell, provides structural support, and gives shape to the cell. Unique component of plant cell.Fungal and protist cells also have cell walls.
Like mitochondria, chloroplasts also have their own DNA and ribosomes. Chloroplasts function in photosynthesis and can be found in eukaryotic cells such as plants and algae
Plasmodesmata (singular = plasmodesma) are junctions between plant cells,
any of a class of small organelles in the cytoplasm of plant cells, containing pigment or food.
is located outside the cell membrane . It gives shape,support and protect the cell
it contains water and dissolved substances . Maitains pressure against the inside of the cell wall
makes and stores plant pigments .These pigments give flowers their colour
