1.

When a freshly collected Spirogyra lament is kept in 10% potassium nitrate solution, it is observed that the protoplasm shrinks in size: 1. What is this phenomenon called?2. What will happen if the lament is replaced in distilled water?

Answer»

1. This phenomenon is called plasmolysis. (The shrinkage of protoplast from the cell wall under the influence of a strong solution/ hypertonic solution is called plasmolysis. 

2. If laments 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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