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GUTTATION
In some plants such as tomato and colocasia, water drops ooze out from the uninjured margins of the leaves where a main vein ends. This is called as guttation and takes place usually early in the morning when the rate of absorption and root pressure are high while the transpiration is very low. Courtesy: 1.http://www.studentsguide.in. 2. http://www.bio.miami.edu Under higher root pressure, water is given to the epithem by the xylem of the veins. From epithem, the water is released into the cavity. When this cavity is completely filled with the watery solution, the latter begins to ooze out in the form of watery drops through the water pore. |
Last modified: Tuesday, 5 June 2012, 7:11 PM