Plant Transport: Xylem Flashcards
Transpiration drives the transport of water and minerals from __________ to __________ via the xylem.
Roots to shoots
What is a apoplasitc route?
Materials travel across cell walls (More energy)
What is a symplastic route?
Materials travel through cytoplasm of cell (Least energy)
What is a transmembrane route?
Materials cross cell membranes of each cell (Most energy)
What is the endodermis?
Controlled entry to the vascular cylinder
What is the name if the guard inside the endodermal cell?
Casparian strip
What does the casparian strip contain?
Suberin
Wha tis the function of the casparian strip?
protect the vascular cylinder
What does water move toward in a tree?
More negative water potential
What is in xylem sap?
Water and minerals
What is transpiration?
water lost through stomata in leaves
What is the “tension” or pull source in a tree?
Sun
What is cohesion?
Things stick together (H2O molecule)
What is adhesion?
Things stick to xylem wall
What kind of wood houses the transportation in the tree?
Sapwood
