Write an experiment to show that chlorophyll is necessary for photosynthesis.

By Ritesh|Updated : November 6th, 2022

We can show that chlorophyll is required for photosynthesis using the starch experiment. Experiment on chlorophyll is necessary for photosynthesis are:

  • Prepare a potted plant with variegated leaves such as croton and place it in a dark place without direct sunlight for 3 days. This stops photosynthesis and weakens the plant.
  • The plants are then placed in the sun for 6-8 hours.
  • Plants can now photosynthesize and produce starch.
  • Mark the green part of the leaf and draw it on a piece of paper. Mark the area in green and yellow.
  • The green part contains chlorophyll, the yellow part does not.
  • Leaves are soaked in boiling alcohol to decolorize. The leaves slowly lose their green color and turn into alcohol.
  • Soak the discolored leaves in the iodine solution. Remove the leaves from the iodine solution and rinse with distilled water.
  • Remove the leaves from the distilled water and place them in a Petri dish.

Observation of chlorophyll is necessary for photosynthesis

  • Bi-colored areas can be seen on the leaves.
  • Reddish brown and bluish-black.

Conclusion:

  • From this, we can conclude that the previously green parts of the leaves have become blue-black and the yellow parts have become reddish-brown.
  • Green leaves contain chlorophyll. Therefore, they photosynthesize to produce starch, which becomes blue-black with iodine.

Summary:

Write an experiment to show that chlorophyll is necessary for photosynthesis.

A starch experiment to show that chlorophyll is necessary for photosynthesis is mentioned above along with observation and conclusion. Photosynthesis is a process where phototrophs convert light energy to chemical energy that is used to fuel cellular activities.

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