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  • Created by: elle1999
  • Created on: 03-03-16 12:43

Mass flow in the phloem- part 1

Active transport actively loads solutes into the phloem into sieve tubes.

Lowers water potential inside phloem

High pressure at source end of sieve tubes.

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Mass flow part 2

Sink end solutes are removed to be used up.

Increases water potential inside sieve tubes- water leaves by osmosis.

Lowers pressure inside sieve tubes.

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Part 3

Pressure gradient from source to sink end

Pushes solutes to where they're needed

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