Part 2 Plant Transport

Question 1

Translocation

Answer 1

Movement of assimilates throughout the plant

Question 2

Source and sink

Answer 2

Source is part of a plant that loads assimilate into the phloem sieve tube
Thank is a part of the plant that removes the assimilates from Phloem sieve tubes

Question 3

Active loading

Answer 3

Hydrogen ions transported actively out of companion cells.
Creates concentration gradient and how do you turn on the fees back into the companion cells through a co-transporter protein accompanied by sugar molecule.
As concentration of sucrose in companion cells increases it can diffuse through the plasmodesmata into the sieve tube

Question 4

Movement of sucrose

Answer 4

Mass flow
Sap - difference in hydrostatic pressure between two ends of the tube which produces pressure gradient.
Water enters the tube at the source increasing the pressure and it leaves the tube at the sink reducing the pressure therefore supplies source to sink

Question 5

The source
The sink
Along the phloem

Answer 5

• leaves - sugar is made during photosynthesis are converted to secret and loaded into phloem tubeswhen leaves green and transported to others the plant that might be growing or to the roots for storage. Roots in winter
• anywhere that remove the sucrose
• hydrostatic pressure gradient