Plant cell structure
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Created by:
EllieLaurenDaisy on January 11, 2011
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Unit 2
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7 terms
Terms | Definitions |
|---|---|
 Cell Wall | Rigid structure that surrounds plant cells. Mainly made of cellulose (carbohydrate). It supports plant cells. |
| Middle Lamella | The outermost layer of the cell. This layer acts as as an adhesive, sticking adjacent cells together. It gives the plant stability. |
| Plasmodesmata | Channels in the cell walls that link adjacent cells together. They allow transportation and communication of substances between cells. |
| Pits | Regions of the cell wall where it is very thin. They're arranged in pairs - the pit in one cell is lined up with another. They allow transportation of substances between cells. |
| Chloroplast | A small flattened structure. This is the site where photosynthesis takes place; some of which happens on the thylakoid membranes, other parts (the Light-independent stage) happen in the stroma. |
| Amyloplast | A small organelle enclosed by a membrane, containing starch granules. They store starch grains. They also convert starch back to glucose for release when plant requires it. |
| Vacuole/Tonoplast | It is a compartment surrounded by a membrane. Contains cell sap; made up of water, enzymes, waste products and minerals. They keep the cell turgid (stops plants wilting), they're also involved in breakdown and isolation of unwanted chemicals in the cell. The tonoplast is the membrane which controls what enters/leaves vacuole. |
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