Sucrose is manufactured in ____ / source / leaf. Sucrose is ____ by ____ from the source to companion cells and ____. Accumulation of sucrose in sieve tube / phloem will ____ water potential (in sieve tube / phloem). Therefore, water from xylem enter sieve tube / phloem by osmosis that create high hydrostatic / turgor pressure in sieve tube / phloem. Sucrose is used up in root // less sucrose in the root. Sucrose from sieve tube / phloem is unloaded into root cell / sink. Water potential in the sieve tube / phloem increases. Water diffused out from sieve tube / phloem into xylem by osmosis . Therefore, create low hydrostatic pressure in the sieve tube phloem. There is pressure difference between source and sink. . Sucrose from the source is translocated / flow down the (hydrostatic) pressure gradient.

Discuss the pressure flow hypothesis of sugar on in phloem

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