7.8 Transport In The Phloem Flashcards
1
Q
What is a source in a plant?
A
Leaf tissue
2
Q
What is a sink in a plant?
A
New tissues
Roots
Fruit
3
Q
What is the transport of sugars in plants called?
A
Translocation
4
Q
How does sucrose get to the phloem?
A
It moves by facilitated diffusion and is then actively transported with H+ into the phloem
5
Q
Describe translocation from when sucrose enters the phloem
A
Sucrose lowers water potential
Water moves into the phloem from the xylem
At the sinks there is a low hydrostatic pressure
Water moves to sinks carrying sucrose
Companion cells actively transport sugars from phloem to sinks via active transport
