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Question
Explain the term:
Ascent of sap
Explain
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Solution
- Ascent of sap is the upward movement of water and dissolved minerals from the roots to the aerial parts of a plant.
- This movement occurs through xylem vessels.
- Water is absorbed from the soil by the root hairs.
- It then travels upward through the stem to the leaves.
- The main driving force is transpiration pull caused by the evaporation of water from leaf surfaces.
- Other forces that help include root pressure and capillary action.
- The ascent of sap is essential for photosynthesis, cooling, and the transport of minerals in the plant.
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Chapter 6: Plant Water Relation - Exercises [Page 133]
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