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Chapter 12: Transport Processes (Long-Distance Transport: Phloem (Pressure…
Chapter 12: Transport Processes
Concepts
Short-distance transport
Long-distance transport
Isolation mechanisms
Diffusion, Osmosis, and Active Transport
Water Potential
Cells and Water Movement
Pressure Potential
Botany and Beyond: Water and Ecology
water is essential to life
The Water Available in Water
Eutrophication
fresh water
The Water Available in Air
Incipient Plasmolysis
Plasmolyzed
Short-Distance Interellular Transport
Guard Cells
help the stroma open and close
Motor Cells
Joints
either accumulate or expel potassium
Symplast
Apoplast
Plants and People: Farming "Wastelands"
scarce fresh water areas
DNA from desert plants maybe taken and used to help other plants deal with little water
Long-Distance Transport: Phloem
Pressure flow hypothesis
Sources
Actively transported
Polymer trap mechanism
STM/CC Complex
Mass Transfer
Specific Mass Transfer
P-protien
Long-Distance Transport: Xylem
Properties of Water
Cohesive
Adhesive
Water Transport Through Xylem
Cohesion-tension hypothesis
Transstpmatal Transpiration
Transcuticular transpiration
Pressure potential is a negative number
Control of Water Transport by Guard Cells
bulk water movement through xylem is influenced and powered primarily by water loss to the atmosphere
control the entering and loss of water
Alternatives: Desert Plant Biology
Drought avoidance
Drought Tolerance
