Phloem Translocation and Pressure Flow

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7 Terms

1
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Long-distance transport of sugars and other solutes in phloem

Translocation

2
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Plant region that exports sugars into the phloem

Source

3
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Plant region that receives sugars for growth or storage

Sink

4
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Movement of sucrose into phloem at a source

Phloem loading

5
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Movement of sucrose from phloem into sink tissues

Phloem unloading

6
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Model in which source-to-sink pressure differences drive phloem sap

Pressure-flow hypothesis

7
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Movement of phloem sap driven by a hydrostatic pressure gradient

Bulk flow