Example for sugar sucrose.

Definition of sugar sink is an organ that is a net consumer or depository of sugar

ATP used in the process are supplied by

Sucrose is loaded from source cell into sieve tube via

Loading of sucrose into the sieve tube at the source cell reduces water potential inside the sieve tube.

During loading of sucrose, water diffuse from (i) to (ii) by osmosis.

Water generates a (i) that forces sucrose to flow along the sieve tube to the sink cell.

During lower concentration of sucrose in sink cell, sucrose is unloaded from the sieve tube via

If the concentration of sucrose in sink cell is higher, sucrose is unloaded via

Unloading of sucrose from sieve tube to the sink cell decreases the water potential in the sieve tube.