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BIO NMDCAT Biological Importance of Water
nmdcat.online June 27, 2026

The phenomenon of “wilting” in a plant under hot, dry conditions is directly related to a decrease in

A. Solute potential of the cell sap
B. Water potential leading to a loss of turgor pressure
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C. Adhesion of water to the xylem walls
D. Cohesion between water molecules in the leaf mesophyll

📝 Explanation

Wilting occurs when transpiration exceeds water uptake. Cells lose water, decreasing their water potential and turgor pressure. The protoplast no longer presses firmly against the cell wall, and the non-woody tissues lose their rigidity, causing the plant to droop.

📖 Additional Information

  • Solute potential of the cell sap
  • Water potential leading to a loss of turgor pressure
  • Adhesion of water to the xylem walls
  • Cohesion between water molecules in the leaf mesophyll

Wilting occurs when transpiration exceeds water uptake. Cells lose water, decreasing their water potential and turgor pressure. The protoplast no longer presses firmly against the cell wall, and the non-woody tissues lose their rigidity, causing the plant to droop.

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