What happens to phloem sap pressure when sucrose is unloaded at the sink organ?

Type: MCQ • Marks: 1

A. Xylem collapses

B. Water exits phloem by osmosis, decreasing hydrostatic pressure

C. Pressure increases

D. Stomata open

Explanation

Unloading sugar lowers solute concentration at sink; water leaves phloem back into xylem, maintaining a pressure gradient.

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