Considering the values in the following table, what relationship can be observed between the amount of sucrose and the water potential? What would you expect to happen if the amount of sucrose continues to increase? saccharose (M) solution (MPa) 0 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.6 test mass differential 1 (g) 0 -0.2478 -0.3717 -0.4956 -0.6195 -0.7434 -0.8673 -0.9912 -1.1151 -1.239 -1.4868 0.0333 0.0201 0.0143 0.0126 -0.0127 -0.0432 -0.0756 -0.0951 -0.0985 -0.1278 -0.1535 test mass differential 2 (g) 0.05555 0.0355 0.0275 0.015 0.002 -0.0295 -0.0755 -0.093 -0.124 -0.148 -0.1765
WATER POTENTIAL - Water potential is the amount of energy needed to move an infinitesimally small amount of water from the sample to a reference pool of pure free water. It can also be used to assess the water molecules' ability to move freely inside a specific environment or system.
It is measured in kilopascals and has the Greek letter Psi (Ψ) as its representation (kPa).
Water potential, determining how much potential energy there is in water, is what causes water to flow through plants. To move water to the leaves so that photosynthesis can occur, plants use water potential.
COMPONENTS- Solute potential, Matric potential, Pressure potential, and Gravitational potential are all parts of water potential.
FORMULA- Ψ = ΨS + ΨP + ΨG + ΨM
But, the frequently used formula is: Ψ = ΨS + ΨP
Water Potential Affecting Factors
The main factors affecting a plant's water potential are gravity, pressure, and concentration.
1. The solute effect on water potential - The solutes' dilution of water results in a decrease in the water's free energy, which is essentially an entropy effect.
2. The impact of pressure on water potential - Water potential is enhanced by positive pressure, while it is diminished by negative pressure. Plants are subject to both positive and negative pressure. Turgor pressure refers to the cells' positive hydrostatic pressure. Negative hydrostatic pressure commonly causes tension to develop in the xylem conduits.
3.The gravitational pull of gravity on water's potential - Water is drawn downward by gravity until a force of equal and opposite magnitude opposes it. This gravitational potential is affected by the water's density, height above the reference state water, and acceleration brought on by gravity.
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