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WATER RELATIONS (Chapter 6)

WATER RELATIONS (Chapter 6). Terrestrial. Terrestrial. Fig. 6.20 in Molles 2013. Terrestrial. Fig. 6.1, 6.8 in Molles 2013. Aquatic. Aquatic. Figs. 6.27, 6.28 in Molles 2013. 23 o C. 23 o C. Water Saturation of Air. Saturation Water Vapor Density (g/m 3 )

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WATER RELATIONS (Chapter 6)

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  1. WATER RELATIONS (Chapter 6) Terrestrial

  2. Terrestrial Fig. 6.20 in Molles 2013

  3. Terrestrial Fig. 6.1, 6.8 in Molles 2013

  4. Aquatic

  5. Aquatic Figs. 6.27, 6.28 in Molles 2013

  6. 23oC 23oC

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

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

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

  10. Potential for Evaporative Water Loss Fig. 6.3 in Molles 2013

  11. Water Relations of a Terrestrial Animal Fig. 6.7 in Molles 2013

  12. Plant Water Relations Fig. 6.7 in Molles 2013

  13. Water Potential Ψw Concept Quantifies Capacity of Water to do Work (Free Energy)

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

  15. Water Potential: A Measure of Free Energy W

  16. Solute Potential ѱs Osmosis:

  17. Osmosis and the Plant Cell 11

  18. Osmosis and Protozoa

  19. Which has Higher Water Potential? (Effect of Dissolved Substances ѱs) 1 2

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

  21. Which has Higher Water Potential? (Effect of Gravity ѱg)

  22. Pressure Potential (ѱp) Negative Pressure Potential: “Sucking In” / Inhaling” Positive Pressure Potential: “Blowing Out / Exhaling”

  23. Positive and Negative Pressure (ѱp)

  24. Positive and Negative Pressure Potential (ѱp)

  25. Water Potential: A Measure of Free Energy W

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

  27. Which soil has greater Water Potential? Wet Sand Wet Clay ψ1 ψ2

  28. Which root water has greater Water Potential? (Effect of Dissolved Substances) ψ1 ψ2 = Solute

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

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

  31. Will Water Transpiration occur (Soil Water to Roots to Xylem to Leaves to Air)?

  32. Water Relations of a Terrestrial Plant Fig. 6.7 in Molles 2013

  33. Water Relations: Terrestrial Animal vs. Plant Fig. 6.7 in Molles 2013

  34. Adaptations for Desert Living: Plants and Animals Fig. 6.20 in Molles 2013

  35. Water Movement in Aquatic Environments Saltwater Freshwater

  36. Water (and Salt) Movement in Aquatic Organisms Isoosmotic: Hyperosmotic: Hypoosmotic:

  37. Osmotic Stress in Hyperosmotic (Freshwater) Organisms Fig. 6.4 in Molles 2013

  38. Osmoregulation in Hyperosmotic Aquatic Organisms I Fig. 6.28 in Molles 2013

  39. Osmoregulation in Hyperosmotic Aquatic Organisms II http://www.emc.maricopa.edu/faculty/farabee/biobk/contractilevac.gif

  40. Osmotic Stress in Hypoosmotic (Marine) Organisms Fig. 6.4 in Molles 2013

  41. Osmoregulation in Hypoosmotic Aquatic Organsims I Fig. 6.27 in Molles 2013

  42. Osmoregulation in Hypoosmotic Aquatic Organisms II http://www.kcl.ac.uk/ip/christerhogstrand/courses/hb0223/images/water&8.jpg

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