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Take two potted plants of the same kind. Keep one in the dark (or in a black box) for 72 hours and the other in sunlight. Perform iodine test with the leaves of both the plants as you did in Class VI. Record your results. Now leave the pot which was earlier kept in the dark, in the sunlight for 3 – 4 days and perform the iodine test again on its leaves. Record your observations in your notebook. The leaves other than green also have chlorophyll. The large amount of red, brown and other pigments mask the green colour. Photosynthesis takes place in these leaves also.
1. Iodine test is done for testing .
2. Presence of startch indicates with a colour change of
Reference:
Wikipedia - https://commons.wikimedia.org/wiki/File:Leaves_of_different_colours.jpg
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