What is the water potential of potato?
Measurements of the water potential components in stored potato tubers were made over two storage seasons. Total potential at harvest was about −0.3 MPa and decreased to −0.5 to −0.6 MPa over the first 5 to 7 weeks of storage. During the remaining 25 weeks of storage the potential decreased another 0.1 MPa.
How do you find the water potential of a potato from a graph?
To find this, draw the straight line on your graph that best fits your data. The point at which this line crosses the x axis represents the molar concentration of sucrose with a water potential that is equal to the potato tissue water potential.
What is the water potential of potato tuber cells?
Using a conversion table, I can see that the water potential of the potato cells is around -500 kPa. At this water potential the potato’s don’t gain or lose mass, this is because the potentials are equal so the water into the cells equals the water out of the cells.
What is the water potential of a potato in kPa?
Before carrying out the investigation I predicted that the water potential of the potato tuber cells would be within the range of minus 1280 kPa and minus 260 kPa.
What would happen to the water potential of a potato if left to dehydrate in the open air?
If the potato is allowed to dehydrate by sitting out in the open air the water potential would decrease (be more negative) because the concentration of solutes within the cells would increase as potato cells dehydrate. Therefore, the osmotic pressure and water potential both decrease.
What is the water potential of the surrounding solution?
The water potential of the surrounding solution is –0.32Mpa. When the cell was first put into the solution, it was flaccid. 1. Since the cell was put into this solution, its solute potential and pressure potential have both risen.
Does water have a high water potential?
The potential of pure water (Ψwpure H2O) is designated a value of zero (even though pure water contains plenty of potential energy, that energy is ignored).
How is water potential measured?
Essentially, there are only two primary measurement methods for water potential—tensiometers and vapor pressure methods. Tensiometers work in the wet range—special tensiometers that retard the boiling point of water have a range from 0 to about -0.2 MPa.
What is the water potential of the potato cells quizlet?
The water potential of the potato cells in this example is therefore -7.84 bars.