2-10-10WaterFluxPlants - B IOL 131 0 0 Biology II: Developm...

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BIOL 13100  Biology  II:  Development,  Structure,  and  Function  of Organisms Nancy Pelaez, Feb 10, 2010, Purdue University, Spring 2010 Freeman (‘08)  Ch 37 p. 813-827 Lecture 12:  Water flux in plants
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osmotic and hydrostatic potentials in root hair and plant  cells  1.1 turgor pressure - wilting of plants  1.2 proton ATPase  activity is associated with increasing cytosol  concentrations of K and Cl - , water influx and high turgor pressure 1.3 hydrostatic pressure continuously forces water into adjacent cells through  the plasmodesmata capillarity in the xylem 1.4 water has a surface tension and meniscus 1.5 cohesion and adhesion 1.6 Ψ p  = -2T/r, where r is the radius of curvature and T is the surface tension of  water.  T= 7.3 * 10 -8  MPa m the Cohesion-tension mechanism  1.7 transpiration - negative pressure produced at the air-water surface is  inversely proportional to the radius of curvature of the meniscus 
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This note was uploaded on 02/21/2010 for the course BIO 131 taught by Professor Paleaz during the Spring '10 term at Purdue University-West Lafayette.

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2-10-10WaterFluxPlants - B IOL 131 0 0 Biology II: Developm...

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