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When a freshly collected Spirogyra filam...

When a freshly collected Spirogyra filament is kept in a 10 % potassium nitrate solution, it is observed that the protoplasm shrinks in size
(a) What is this phenomenon called ?
(b) What will happen if the filament is replaced in distilled water ?

Text Solution

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(a) This phenomenon is called plasmolysis. The shrinkage of protoplast from the cell wall under the influence of a strongsolution/hypertonic solution is called plasmolysis.
(b) If filaments are replaced in water the protoplast starts swelling. It comes in contact with cell wall and cell regains its original size. The swelling up of plasmolyzed protoplast under the influence of a weak solution or water is called deplasmolysis
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