BY1.3 - Water Potential

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Water potential 

In plants:

  • The presenc of solutes in the vacuole lowers the water potential
  • The concnetration of solutes in the vacuole is the solut potenital
  • Water enters the vacuole by osmosis and hydrostatic pressure is set up and pushes outwards
  • The pressure builds up and the cell developes and opposing force called the pressure potential which is normally positive


  • Water potential of external solution is lower than the wtaer potential of the cell
  • Water diffuses out


  • Water potential of the external solution is higher than the water potential of


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