Ch 37 sugar water

Ch 37 sugar water - Up in the trees Chapter 37: Water and...

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Unformatted text preview: Up in the trees Chapter 37: Water and Sugar Transport in Plants A) What Factors Affect Water Potential? 1) Calculating Water Potential 2) Water Potentials in Soils, Plants, and the Atmosphere B) Three types of water movement in plants 1) Root Pressure 2) Capillary Action 3) Cohesion-Tension Theory (Long-Distance Water Transport) C) What Evidence Do Biologists Have for the Cohesion-Tension Theory? KEY POINTS : Water moves along potential energy gradientsfrom areas of high water potential to areas of low water potential. No Energy used! Water at the air-water surface in leaves is under negative pressure (tension) that is great enough to pull water up from the roots through xylem. Click to edit Master subtitle style 4/7/11 Chapter 37: Water and Sugar Transport in Plants Why Does Water Loss Occur? Transpiration = water loss due to evaporation What is necessary for transpiration? 4/7/11 Water movement is due to differences in water potential Water moves down the gradient from high to low Click to edit Master subtitle style 4/7/11 #1. Solute Potential (Concentration) INCREASE Solutes = DECREASE Solute Potential Solute Potential of Pure Water = 0 What Factors Affect Water Potential? 4/7/11 HYPOTON IC ISOTON IC Solute Potential is the tendency of water to move by osmosis Fig Click to edit Master subtitle style...
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This note was uploaded on 04/06/2011 for the course BIO 101 taught by Professor Freeman during the Spring '11 term at Union.

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Ch 37 sugar water - Up in the trees Chapter 37: Water and...

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