Most of the water flow in the roots occurs via the apoplast because:
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Correct answer: It refills broken water columns in xylem vessels
The main contribution of root pressure is not to push water to great heights, but to re-establish the continuous columns of water in the xylem which often break under the enormous tensions created by transpiration.
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More Water Transport in Plants questions
- What is the primary role of root pressure in the ascent of sap?
- Which of the following is a limitation of the apoplastic pathway?
- The 'tensile strength' of water is its ability to:
- Capillarity, the ability of water to rise in thin tubes, is aided by which characteristic of xylem elements?
- During transpiration, water evaporates from the ______ of the leaf into the intercellular spaces.
- Which of the following statements about the 'Mass Flow Hypothesis' is correct?