The expulsion of cellular moisture accompanied by protoplasmic contraction stems from
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Answer: D. Plasmolysis
Explanation
Plasmolysis involves the expulsion of cellular water through the process of osmosis. This cellular water loss leads directly to noticeable protoplasmic contraction inside the cell. Plasmolysis occurs when plant cells are placed into a hypertonic surrounding solution. Osmosis drives water molecules from a region of higher water potential inward. Hypertonic external solutions have higher solute concentrations than the plant cell cytoplasm. The plasma membrane pulls away from the rigid cell wall during severe plasmolysis.
High soil salinity creates hypertonic conditions that frequently induce plasmolysis in crops. Excessive chemical fertilizer application can dehydrate plant roots through similar osmotic pressure. Studying cellular responses helps researchers understand how plants tolerate drought and salinity. Oxidation involves chemical electron loss reactions rather than direct cellular water expulsion. Deplasmolysis is the reverse process where a plasmolyzed cell absorbs water and recovers. Osmosis is the underlying mechanism driving water movement during the plasmolysis process.
- Subject
- Agriculture
- Category
- Agriculture
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- —
- Difficulty
- medium
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