A Rosebush Needs to Increase the Concentration of Phosphorus in the Water

question 128

Multiple Choice

A rosebush needs to increase the concentration of phosphorus in the water within its xylem. Assuming there are sources of phosphorus in the soil, which of the following actions of the plant could lead to physiologically important increases in phosphorus uptake?

• A)acidifying the rhizosphere
• B)transferring more carbohydrate to mycorrhizal symbionts
• C)opening stomata to increase the transpiration rate, thus increasing the flow of soil water and dissolved nutrients to the roots
• D)activating phosphorus transporters in the root cap

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