Support and Transport Systems in Plants: Water uptake and transport

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9 Terms

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  1. Xylem transport


Moves water and mineral salts from roots to the aerial parts of the plant.

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  1. How do minerals enter the xylem? By active transport.
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  1. How does water enter the xylem? Water moves by osmosis after mineral uptake lowers the water potential in the xylem.
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  1. Root pressure

Pressure created when water enters the roots, helping push water upwards through the xylem.

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  1. Transpiration pull

Tension created by water loss from leaves that pulls water upwards through the xylem.

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  1. Cohesion

Attraction between water molecules that keeps a continuous column of water together.

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  1. Adhesion

Attraction between water molecules and the walls of the xylem.

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  1. Capillary action

Upward movement of water through narrow tubes due to cohesion and adhesion.

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  1. Why are xylem vessels hollow? They are dead at maturity and have no cell contents, allowing water to flow easily.