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Describe the Cohesion-tension Theory of Water Transport in the Xylem

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Outline the role of the xylem in the movement of water through a plant describe theories for the ascent of water including root pressure capillary action and imbibition explain how the cohesiontension cohesionadhesion theory can be used to describe the movement of water in the xylem compare the different theories of water movement in the xylem to explain why the. This theory was proposed by Dixon and Joly 1894 and has been supported by Curtis and Clark 1951 Levitt 1969. The Cohesion Tension Theory Explains Water Movement Ppt Download H2O molecules tend to stick to the inside of the xylem 29. . The above theory is also konwn as Dixon theory of ascent of sap. The potometer is shown in Figure 1As water is lost from the shoot it is replaced by water from the capillary tube. Water molecules stick together via hydrogen bonds in a process known as COHESION. Evaporation exerts force causing tension in water columns Cohesion holds ...
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