Translocation

Question 1

What during source in translocation?

Answer 1

high conc^ of solute e.g. sucrose

1) active transport of solute from companion cell into sieve tube cells
2) this decreases the water potential
3) water moves in by osmosis from companion cell and xylem
4) creates high hydrostatic pressure in phloem

Question 2

What happens during sink in translocation?

Answer 2

sink uses, breaks down or converts the solute into something else

creates a low conc^ of the solute e.g. sucrose to starch

increases the water potential - water moves out by osmosis

decreases the pressure in the phloem