| Front | How does the mass flow of sucrose down the phloem occur? |
|---|---|
| Back | - low wp in sieve tubes where sucrose enters - water moves by osmosis from xylem into sieve tubes - increase in water volume causes increase in hydrostatic pressure - sucrose actively transported from sieve tubes into sink by companion cell - low wp at sink - water moves by osmosis from sieve tubes into sink - decrease in water volume reduces hydrostatic pressure - mass flow of sucrose down hydrostatic pressure gradient |
Tags: plant_transport
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