Applying Fungicides to Plants May Result in a Phosphorus Deficiency

question 125

Multiple Choice

Applying fungicides to plants may result in a phosphorus deficiency. What is the MOST likely explanation for this observation?

• A)The fungicide destroys phosphorus transporters in the plasma membrane of root cells.
• B)After fungicide is sprayed, plant cell walls impede the uptake of phosphorus to limit the amount of fungicide that enters the plant.
• C)The fungicide blocks ATP synthesis, so phosphorus cannot be absorbed into plant cells.
• D)The fungicide inhibits nitrogen fixation.
• E)The fungicide destroys mycorrhizal symbionts.

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Definitions:

Phloem

Phloem is the vascular tissue in plants responsible for the transport of sugars and nutrients from the leaves to other parts of the plant.

Sieve Tube Elements

Cells found in the phloem of vascular plants that facilitate the transport of sugars and other nutrients throughout the plant.

Lateral Meristems

Areas of localized cell division on the side of a plant that give rise to secondary tissues. Lateral meristems, including the vascular cambium and the cork cambium, cause an increase in the girth of the plant body. Compare with apical meristem.

Apical Meristems

Regions located at the tips of roots and shoots where cells divide actively, leading to plant growth in length.