Absorption, Transport And Water Loss In Plants

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Permeability is the property of a membrane to allow the passage of substances through it. Plant cell walls are fully permeable, allowing both solvent and solute molecules to pass through. In contrast,…

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Diffusion is the intermingling of molecules of the same or different substances as a result of their random movement from a region of higher concentration to lower concentration. It does not require a…

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Osmosis is the special type of diffusion of solvent molecules (typically water) from a region of higher water concentration to a region of lower water concentration through a semipermeable membrane. K…

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The potato osmoscope experiment demonstrates osmosis through the following steps: (1) A large potato tuber is peeled and a cavity is cut into one end; (2) Sugar solution is poured into the cavity to f…

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When a plant cell is placed in a hypertonic solution (where the external solution has higher solute concentration than the cell sap), water moves out of the cell by osmosis. This causes the protoplasm…

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Isotonic Solution: Has the same concentration of solutes as the cell sap. The cell neither swells nor shrinks; it remains in a stable, turgid state with no net movement of water. Hypotonic Solution: H…

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Imbibition is the absorption and adsorption of water by protoplasmic and cell wall constituents of dry plant material (seeds, dry wood) when they come in contact with water. Water is absorbed through …

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Water potential (ψ, psi) is the energy of water molecules or the tendency of water to leave a system—essentially, the ability of free water molecules to do work or move. Pure water has the highest wat…