When leaves transpire the water potential of mesophyll cells is:
Correct answer: C. Decreased
- A. Increased
- B. Does not change
- C. Decreased
- D. First increased and then decreased
Explanation
The correct answer is "Decreased." When leaves transpire, they lose water vapor, which decreases the water potential of the mesophyll cells. This decrease creates a negative water potential gradient that draws water from the xylem into the mesophyll cells to replace the lost water. The other options are incorrect because they either misinterpret the effect of transpiration on water potential or describe processes not directly related to the primary impact of transpiration.
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About Forms and Functions of Plants
Plant nutrition and transport cover mineral uptake, photosynthesis, xylem movement of water and minerals, and phloem translocation of sugars. Plant growth regulators include auxins, gibberellins, cytokinins, abscisic acid and ethene, whose effects on cell division, elongation, dormancy, fruit ripening and tropic responses should not be confused with mineral nutrition.
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