plant physiology
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13 Terms
How does water move from the soil the plant to the atmosphere
down the water potential gradient
Water transport in plants
1, diffusion
2, Osmosis
3, bulk flow
Water potential provides the _________ for water movement
driving force
What determines the rate of water movement
hydroliyic conductivity
Aquaporins are
integral membrane proteins that form water-selective channels in membranes
Aquaporins
facilitate symplastic water uptake into roots
Calculated rates of water
diffusion across lipid bilayers were lower than observed rates
facilitate rapid water
movement in cells
Two major processes in water transport
diffusion
bulk flow
Volume flow rate
[ pir4/8n] [ app/ax]
Flow rate
driving force and hydraulic conductivity
Hydraulic conducitivity
expresses how readlily water moves across a membrane, units are volume of water per unit area of membrane per unit of time driving force
Water transport occurs
through the xylem in reponse to Ap gradient
Note 
Flashcards (25)