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WATER RELATIONS (Chapter 6)

WATER RELATIONS (Chapter 6). Terrestrial. WATER RELATIONS (Chapter 6). Saltwater. Freshwater. 23 o C. 23 o C. Water Saturation of Air. Saturation Water Vapor Density (g/m 3 ) Saturation Water Vapor Pressure (kPa). Fig. 6.2 in Molles 2010. Fraction of Water Saturation in Air I.

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WATER RELATIONS (Chapter 6)

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  1. WATER RELATIONS (Chapter 6) Terrestrial

  2. WATER RELATIONS (Chapter 6) Saltwater Freshwater

  3. 23oC 23oC

  4. Water Saturation of Air Saturation Water Vapor Density (g/m3) Saturation Water Vapor Pressure (kPa) Fig. 6.2 in Molles 2010

  5. Fraction of Water Saturation in Air I Relative Humidity http://upload.wikimedia.org/wikipedia/commons/8/84/Relative_humidity.jpg Actual Water Vapor Density Rel. Humidity = X 100 Saturation Water Vapor Density

  6. Fraction of Water Saturation in Air II Vapor Pressure Deficit Vapor Pressure Deficit = Saturation Vapor Pressure – Actual Vapor Pressure

  7. Potential for Evaporation Fig. 6.3 in Molles 2010

  8. WATER MOVEMENT: OSMOSIS Hypotonic, Isotonic, Hypotonic

  9. Osmotic Stress in Marine Organisms Fig. 6.4 in Molles 2010

  10. Strategies for Coping with Hyperosmotic Environments I (Osmoregulation) Fig. 6.27 in Molles 2010

  11. Strategies for Coping with Hyperosmotic Environments II (Osmoregulation) http://www.kcl.ac.uk/ip/christerhogstrand/courses/hb0223/images/water&8.jpg

  12. Osmotic Stress in Freshwater Organisms Fig. 6.4 in Molles 2010

  13. Strategies for Coping with Hypoosmotic Environments I (Osmoregulation) Fig. 6.28 in Molles 2010

  14. Strategies for Coping with Hypoosmotic Environments I I (Osmoregulation) http://www.emc.maricopa.edu/faculty/farabee/biobk/contractilevac.gif

  15. Osmosis and the Plant Cell 11

  16. Will Water Flow? 4

  17. Water Potential (ψ ) = Ability to Do Work (Measured in pressure units: MPa) Fig. 6.5 in Molles 2010

  18. Water Potential (ψ ) = Ability to Do Work (Measured in pressure units: MPa)

  19. Which has greater Water Potential? ψ1 ψ2

  20. Which soil has greater Water Potential? (Matric Forces) Wet Sand Wet Clay ψ1 ψ2

  21. Which has Higher Water Potential? (Effect of Dissolved Substances) 5

  22. Which has Higher Water Potential? (Effect of Dissolved Substances)

  23. Which root has greater Water Potential? (Effect of Dissolved Substances) = Salt

  24. Predicting Direction of Water Flow: Soil Water Potential and Root Water Potential Roots ψ1 Soil ψ2

  25. Which root has greater Water Potential? (Effect of Relative Humidity) ψ1 ψ2

  26. In Which System is there a Greater Difference in Water Potential 8 10 9 Dry Air Moist Air

  27. Will Tranpiration Occur?

  28. Water Relations of a Plant 13

  29. Plant Water Relations Fig. 7.7 in Molles 2008

  30. Water Relations of an Animal 14

  31. Animal Water Relations Fig. 6.7 in Molles 2008

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