1 Sentinel Molecular Diagnostics for Crop Agroterrorism Dr. Joe Eugene Lepo Center for Environmental Diagnostics and Bioremediation University of West Florida, Pensacola Tuesday, February 13th, at 4:30 – 5:30 p.m. Ruhl Student Center, Community Room STSS07 Schedule & Abstract Site (c lick here)
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1 Sentinel Molecular Diagnostics for Crop Agroterrorism Dr. Joe Eugene Lepo Center for Environmental Diagnostics and Bioremediation University of West.
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Sentinel Molecular Diagnostics for Crop Agroterrorism
Dr. Joe Eugene LepoCenter for Environmental Diagnostics and Bioremediation
University of West Florida, Pensacola
Tuesday, February 13th, at 4:30 – 5:30 p.m.
Ruhl Student Center, Community RoomSTSS07 Schedule & Abstract Site (click here)
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Water Relations
Chapter 5
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Water Availability
• The tendency of water to move down concentration gradients, and the magnitude of those gradients, determine whether an organism tends to lose or gain water from its environment. Must consider an organism’s microclimate
in order to understand its water relations.
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Water Content of Air
• Evaporation accounts for much of water lost by terrestrial organisms. As water vapor in the air increases, the
water concentration gradient from organisms to air is reduced, thus evaporative loss is decreased.
Evaporative coolers work best in dry climates.
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Evaporative Water Loss
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Water Movement in Aquatic Environments
• Water moves down concentration gradient. Water is more concentrated in freshwater
environments than in the oceans.• Aquatic organisms can be viewed as an
aqueous solution bounded by a selectively permeable membrane floating in an another aqueous solution.
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Water Movement in Aquatic Environments
• If two environments differ in water or salt concentrations, substances will tend to move down their concentration gradients. Diffusion
Osmosis: Water diffusion through a semipermeable membrane.
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Water Movement in Aquatic Environment
• Isomotic: Body fluids and external fluid are at the same concentration.
• Hypoosmotic: Body fluids are at a higher concentration than the external environment. Water diffuses into body.
• Hyperosmotic: Body fluids are at a lower concentration than the external environment. Water diffuses out of body.