More Exchange and Transport Systems - Transport in Plants - Phloem Flashcards
1
Q
What does phloem tissue transport?
A
Solutes, mainly sugars like sucrose
2
Q
What is phloem composed of?
A
Sieve tube elements:
- living cells that form the tube for transporting solutes
- they have no nucleus and few organelles, so…
Companion cells:
- for each sieve tube element
- carry out living functions for sieve cells, e.g. providing the energy needed for the active transport of solutes
Sieve plates
