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A-Level Biology OCR A

Water Setting Explain Precautions Potometer Leafy Shoot Cut

Front Explain precautions that must be taken when setting up potometer.
Back Setting up potometer:
  • Leafy shoot should be cut and inserted into potometer under water - only water is in xylem so it is not clogged
  • Once set up, leave apparatus for some time before taking measurements - acclimatise the plant for new conditions
  • All joints must be sealed with waterproof jelly to make sure that any water loss measured is a result of transpiration from stem and leaves

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