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  • Which of these is not part of the water potential equation?Option: 1 Osmotic potentialOption: 2</strong

Which of these is not part of the water potential equation?

Option: 1

Osmotic potential


Option: 2

Pressure


Option: 3

Gravitational potential


Option: 4

Type of solute in water


Answers (1)

best_answer
 

Components of Water Potential:

  • Pressure Potential (ψP): It is the hydrostatic pressure of a solution. It is taken as zero at atmospheric pressure. It is generally positive but negative pressure also builds up in the xylem vessels. When pressure is applied externally, water potential becomes positive.
  • Osmotic Potential or Solute Potential (ψs): It is the potential developed due to the addition of the solute. 
  • Gravity: It is generally taken negligible.
  • Matrix Potential: When the hydrating colloids adsorb water on their surfaces, free energy is released. This is called matrix potential. It is always negative. It is also taken as negligible.
  • Therefore, the water potential can be given as:
    • Water Potential = Pressure Potential + SolutePotential

Water potential does not depend on the type of solute in water. Hence, the correct answer is option 4

Posted by

seema garhwal

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