In the pressure-flow model, what happens at a sink region?
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Correct answer: Sugars are unloaded and pressure in the phloem decreases
At a sink, sugars are removed from the phloem for use or storage. This increases water potential, allows water to leave, and lowers pressure in the sieve tubes.
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More Phloem questions
- Which statement best describes the direction of phloem transport?
- Which phloem cells mainly provide mechanical support?
- Which phloem component commonly stores food and assists in lateral transport?
- Which of the following is generally absent in the phloem of many monocot stems?
- What is primary phloem?
- What is secondary phloem?