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11. Transport in Plants
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Q7 of 16 Page 11

What happens when a pressure greater than the atmospheric pressure is applied to pure water or a solution?

A pressure greater than atmospheric pressure when applied to pure water or a solution, its water potential increases. This pressure is called pressure potential and it is represented as ψ p it is usually positive.

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5 Differentiate between the following:  (a) Diffusion and Osmosis(b) Transpiration and Evaporation(c) Osmotic Pressure and Osmotic Potential(d) Imbibition and Diffusion(e) Apoplast and Symplast pathways of movement of water in plants.(f) Guttation and Transpiration.  6 Briefly describe water potential. What are the factors affecting it? 8 (a) With the help of well-labelled diagrams, describe the process of plasmolysis in plants, giving appropriate examples.  (b) Explain what will happen to a plant cell if it is kept in a solution having higher water potential.  9 How is the mycorrhizal association helpful in absorption of water and minerals in plants?
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11. Transport in Plants
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