Group 2.Kang Hao,Shawn,Srinda,Carlin

1. Food Movement
through a Plant
Done By: Kang Hao, Srinda,
Carlin,Shawn

2. The Phloem

3. Phloem
sieve tubes companion cells
Sieve tubes= living cells which contain
cytoplasm but do not have nucleus.
=its function is supported by
companion cell. Each sieve tube has a
companion cell next to it.

4. How food is made?
• Leaves make food by the process of
photosynthesis.
food made is in the form of
simple sugar (glucose).This
glucose is then further
converted into sucrose.

5. How food is transported through sieve
tubes.
• When glucose is converted to sucrose,the sucrose will
enter the phloem by the expense of energy from ATP.
• The pressure of the phloem tissues will increase,thus
making all the tissues in the plant to have low pressure
for transporting of food.
• At this point,the food would be transported to the
storage site or the growing parts of the plant.
• And that happens,the pressure in the phloem would
decrease since there is no transportation of food in the
process.
• A pressure gradient would be set up if there is
transportation of food,high pressure at the phloem and
low pressure in the all the cells in the plant to transport
food.