Determination of the water potential of potato tissues
Water potential graph
It can be affected by several different variables including concentration of salt solutions. Samples of tissue are immersed in a range of external solutions of different strengths. The discs were then weighed again after a period of 24 hours. Water potential is a statement of the status of energyfree water, a measure of power that causes the water to move to a system, such as plant tissue, soil, atmosphere or from one section to another within a system. Water potential is expressed in in bars, a metric unit of pressure equal to about 1 atmosphere and measured with a barometer. Stopper the latter firmly and leave for not less than 24 hours. The latter, being the independent variable, should be on the horizontal axis; the former on the vertical axis. All physiological processes within the plant tissue will not occur without the presence of water plays an important role in that process. The percentage change in mass was then calculated. Directions: 1.
Calculate the percent change of mass, showing your calculations. The tissue that has been in the hypertonic 0. Water potential is expressed in in bars, a metric unit of pressure equal to about 1 atmosphere and measured with a barometer.
Background All living things possess a very large dependence on the sun, because the sun is the main source of energy and the largest energy in the universe. The solution that induces neither an increase nor a decrease in the volume or mass of the tissue has the same water potential as that of the cells in the tissue.
If water moves out of the cell, the cell will shrink.
Under these conditions there will be a net movement of water into the cell. Note that chemical potential is a relative quantity: It is expressed as the difference between the potential of a substance in a given state and the potential of the same substance in a standard state.
In this experiment I am going to change the molarity of the sucrose solution out the cells of potato.
based on 109 review