bio project 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 mitochondria.
• The pressure of the phloem tissues will
increase due to the energy given by the
mitochondria,thus making all the tissues in
the plant to have low pressure for
transporting of food.

6. • 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.
• The pressure of the phloem increases due to the low concentration
of food in the storage site and the growing parts of the cell,thus
allowing high concentration of food in the phloem to travel to the
storage and growing parts of the plant.