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Resource Acquisition in Vascular Plants
Ch: 36; Unit 8: Plants
18
Biology
12th Grade
02/27/2011

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Term
transpiration
Definition
water mvt
Term
translocation
Definition
food mvt
Term
water enters:
Definition
through roots
Term
water exchanged:
Definition
in leaves in gas form
roots in liquid
Term
sugars move
Definition
down from leaves to rest of plant
sometimes stored in stem or roots- so moves up also
Term
Mycorrhizae:
Definition
fungus helps plant absorb water and nutrients
Term
Co-Transport
Definition
cell pumps ions in and out against gradient
requires ATP
used to help bring nitrate into cell
used to move sugar between cells
Hydrogen
Term
Symplastic mvt
Definition
water moves thru Cyto/plasmodesmota
Term
Apoplastic moves:
Definition
through CWs
Term
Transmembrane mvt
Definition
water moves through CW and cyto.
Term
Casparian strip
Definition
barrier for water to the xylem
Term
Forces moving water
Definition
root pressure
adhesion/cohesion
atmosphere/transpiration
Term
root pressure
Definition
actively transporting ions
lowers WP- water will then follow
gravity prevents water being pushed up all the way
Term
Adhesion/Cohesion
Definition
helps mvt
water sticks to container and to other like cells
Term
Atmosphere/Transpiration
Definition
water evaporates out of leaf=> lower WP (tension)
water pulled up to leaves
stomata crucial
guard cells
Term
Guard Cells
Definition
can sense water level and control how open stomata are
pump K ions into cells to encourage water to move into G cells (low WP)- when lots of water available
Term
Hydrostatic pressure
Definition
solutes move into sieve tube, lowers WP
water from other cells move into tube
forces sugars to move through tube
Term
Source to Sink translocation
Definition
source: where sugar is made
sink: where sugar is needed
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