2165689
Description
Flashcards by Amy Darvill, updated more than 1 year ago
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Created by Amy Darvill
over 11 years ago
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| Question | Answer |
| Vascular tissue/bundle: | This is the transport tissue in a plant that is found in a bundle. It contains both xylem and phloem |
| Endodermis: | A ring of cells that form the inner layer of the cortex of a root. It surrounds the xylem and phloem |
| Meristem cells: | These are undifferentiated plant cells that are capable of rapid cell division |
| Pericycle: | A layer of cells in the root that lays just inside the endodermis, normally made up of Meristem cells |
| Xylem: | A plant tissue containing xylem vessel and other cells to transport water in a plant, they also provide the plant with support |
| Lignin: | This is a waterproofing substance that surrounds the walls of xylem tissue |
| Parenchyma: | They are relatively unspecialised plant cells. They may be able to photosynthesis and they store food and support young plants |
| Phloem: | A tissue in plants that is used to transport dissolved sugars and other substances |
| Sieve tube elements: | A cell found in phloem tissue though which the sap containing sucrose is transported |
| Companion cell: | A cell in the phloem that is involved in loading sucrose into the sieve tube elements |
| Cambium: | Plant tissue found in the stem and root that contains dividing cells |
| Turgid: | This describes a cell that is full of water as a result of entry of water by osmosis |
| Water potential: | This is the measure of the ability of water to move freely in a solution |
| Osmosis: | This is the net movement of particles down the concentration gradient, from an area of high concentration to an area of low concentration across a partially permeable membrane |
| Apoplast pathway: | The root taken by water between the cells or through the cell walls in a plant |
| Symplast pathway: | The route taken by water through the cytoplasm of cells in a plant |
| Vacuolar pathway: | The path taken by water in plants as it passes from cell to cell via the cytoplasm and vacuole |
| Plasmodesmata: | These are gaps in the cell that contain a fine strand of cytoplasm |
| Casparian strip: | This is the strip of water proof material in the cell wall of epidermis cells. It also blocks the Apoplast pathway. |
| Transpiration: | The loss of water vapour from the aerial plants of a plant due to evaporation |
| Cohesion: | The attraction between water molecules due to hydrogen bonding |
| Adhesion: | This is the force of attraction the water molecules have to the side of the xylem vessel this helps transports the water up the xylem. |
| Stomata: | These are pores in the leaf epidermis that open and close to allow diffusion of gases and transpiration |
| Xerophytes: | These are plants that a specifically adapted to living in dry areas |
| Translocation: | The movement of sucrose and other substances up and down the phloem |
| Co transporter proteins: | This allows movement of sucrose by linking it to the hydrogen ions |
| Sink: | A part of the plant that removes sugars from the phloem |
| Source: | A part of the plant that releases sugars into the phloem |
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