Uploaded by Sreeja Rajan

Biology

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OSM​OSIS​ OF ​PLANTS
By: jazz g9s
What is osmosis?
Osmosis is a process when molecules of a solvent (liquid)
diffuses through a semipermeable membrane from a less
concentrated solution into a more concentrated one,
equalizing the concentrations on each side of the plant membrane.
Process ?
When the total water potential is bigger outside the plant cells than inside,
water diffuses into the cytoplasm and vacuole, equalizing the
concentrations on each side of the plant membrane. the cells swell and
become firm. However the plant cells have cell walls not like animal cells
which only has a layer of cell membrane, because cell wall are much
stronger it stops the cell from bursting by resisting and presses back on the
content. A plant cell in this process is said to be ‘turgid’ (very firm)
Examples?
When a plant cell is placed in a solution with a very low water potential, for
example a concentrated salt solution, the plant it will lose water by
osmosis. This is because the
concentrated salt solution has a
much lower water potential than
the cell, so the water molecules
diffuses out of the cell.
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