Mass Flow 2 Flashcards
1
Q
How is sucrose actively loaded into companion cells at source?
A
Co-transport with hydrogen ions
2
Q
Evidence against mass flow hypothesis
A
Sugar travels to many different sinks and does not move faster to the one with highest water potential which it should according to mass flow hypothesis.
3
Q
Evidence for mass flow hypothesis
A
Preventing ATP production stops translocation but not water movement
Sucrose concentration higher in leaves than roots
4
Q
What are 2 types of experiment that can provide evidence for mass flow?
A
Ringing experiments
Tracing experiments
