Transport in Plants Flashcards
Transport in Xylem
Water moves from roots to leaves through Root Pressure, Adhesion, Cohesion, and Transpiration
Root Pressure
As water enters roots it creates pressure (caused by osmosis) which pushes water upward. Water and minerals move into stem and into leaves through veins, increasing the pressure and pushing water up against gravity to rest of plant.
Adhesion
Water’s ability to stick /adhere to the sides of xylem due to water’s polar nature.
Cohesion
Ability of water molecules to stick to each other (polar nature) due to hydrogen bonds. When one molecule is pulled, the others follow.
Transpiration
When water evaporates from leaves or stems and more water moves up from the roots through the xylem to replace it
Transport in the Phloem
Translocation= transportation of sucrose through the phloem. It moves down for winter storage and back up to trunk and branches in the spring.