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Exchange and transport, transport in plants key definitions
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- 1Vascular tissue/bundle:This is the transport tissue in a plant that is found in a bundle. It contains both xylem and phloem
- 2Endodermis:A ring of cells that form the inner layer of the cortex of a root. It surrounds the xylem and phloem
- 3Meristem cells:These are undifferentiated plant cells that are capable of rapid cell division
- 4Pericycle:A layer of cells in the root that lays just inside the endodermis, normally made up of Meristem cells
- 5Xylem:A plant tissue containing xylem vessel and other cells to transport water in a plant, they also provide the plant with support
- 6Lignin:This is a waterproofing substance that surrounds the walls of xylem tissue
- 7Parenchyma:They are relatively unspecialised plant cells. They may be able to photosynthesis and they store food and support young plants
- 8Phloem:A tissue in plants that is used to transport dissolved sugars and other substances
- 9Sieve tube elements:A cell found in phloem tissue though which the sap containing sucrose is transported
- 10Companion cell:A cell in the phloem that is involved in loading sucrose into the sieve tube elements
- 11Cambium:Plant tissue found in the stem and root that contains dividing cells
- 12Turgid:This describes a cell that is full of water as a result of entry of water by osmosis
- 13Water potential:This is the measure of the ability of water to move freely in a solution
- 14Osmosis: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
- 15Apoplast pathway:The root taken by water between the cells or through the cell walls in a plant
- 16Symplast pathway:The route taken by water through the cytoplasm of cells in a plant
- 17Vacuolar pathway:The path taken by water in plants as it passes from cell to cell via the cytoplasm and vacuole
- 18Plasmodesmata:These are gaps in the cell that contain a fine strand of cytoplasm
- 19Casparian strip:This is the strip of water proof material in the cell wall of epidermis cells. It also blocks the Apoplast pathway.
- 20Transpiration:The loss of water vapour from the aerial plants of a plant due to evaporation
- 21Cohesion:The attraction between water molecules due to hydrogen bonding
- 22Adhesion: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.
- 23Stomata:These are pores in the leaf epidermis that open and close to allow diffusion of gases and transpiration
- 24Xerophytes:These are plants that a specifically adapted to living in dry areas
- 25Translocation:The movement of sucrose and other substances up and down the phloem
- 26Co transporter proteins:This allows movement of sucrose by linking it to the hydrogen ions
- 27Sink:A part of the plant that removes sugars from the phloem
- 28Source:A part of the plant that releases sugars into the phloem
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- Fichas sobre Exchange and transport, transport in plants key definitions, creado por Amy Darvill el 02/03/2015.
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- Amy Darvill · mar 2015
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