ct one: a. In apoplastic loading, the solute potential of the companion cells is more negative than the apoplastic space nearby. b. Apoplastic phloem unloading enables the import of sugars against their concentration gradient into sink tissue. C. In apoplastic loading, proton pumps create electrochemical gradients that can be used by symporter proteins to import sugars into the companion cell. d. All the statements are true. e. Symplastic loading relies on diffusion of the sugars through plasmodesmata from photosynthetic cells to the phloem cells.
ct one: a. In apoplastic loading, the solute potential of the companion cells is more negative than the apoplastic space nearby. b. Apoplastic phloem unloading enables the import of sugars against their concentration gradient into sink tissue. C. In apoplastic loading, proton pumps create electrochemical gradients that can be used by symporter proteins to import sugars into the companion cell. d. All the statements are true. e. Symplastic loading relies on diffusion of the sugars through plasmodesmata from photosynthetic cells to the phloem cells.
Biology (MindTap Course List)
11th Edition
ISBN:9781337392938
Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Chapter34: Leaf Structure And Function
Section: Chapter Questions
Problem 11TYU: There is a trade-off between photosynthesis and transpiration in leaves because (a) numerous...
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Question
When considering the loading and unloading of photosynthate from the phloem, which of the following is FALSE?
![[PLANT PHYSIOLOGY] When considering the loading and unloading of photosynthate from the phloem, which of the following is FALSE?
Select one:
O a.
In apoplastic loading, the solute potential of the companion cells is more negative than the apoplastic space nearby.
Ob.
Apoplastic phloem unloading enables the import of sugars against their concentration gradient into sink tissue.
In apoplastic loading, proton pumps create electrochemical gradients that can be used by symporter proteins to import sugars into the
companion cell.
o d. All the statements are true.
O e.
Symplastic loading relies on diffusion of the sugars through plasmodesmata from photosynthetic cells to the phloem cells.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F40cbeb66-d88d-4e01-b4b5-1176e5b78ecf%2F4f5e85f8-e6ea-46a2-89ae-fac8b59a894e%2F6l25wg8_processed.jpeg&w=3840&q=75)
Transcribed Image Text:[PLANT PHYSIOLOGY] When considering the loading and unloading of photosynthate from the phloem, which of the following is FALSE?
Select one:
O a.
In apoplastic loading, the solute potential of the companion cells is more negative than the apoplastic space nearby.
Ob.
Apoplastic phloem unloading enables the import of sugars against their concentration gradient into sink tissue.
In apoplastic loading, proton pumps create electrochemical gradients that can be used by symporter proteins to import sugars into the
companion cell.
o d. All the statements are true.
O e.
Symplastic loading relies on diffusion of the sugars through plasmodesmata from photosynthetic cells to the phloem cells.
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