Chapter 1: Nutrients in Plants

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Q
Nutrition in Plants

Question:

How would you test the presence of starch in leaves?

Answer:

Test to show the presence of starch in leaves:

Take a green leaf and heat it in boiling water for 30 minutes. Now, take that leaf and heat it again in ethanol for a few minutes. The boiling ethanol will absorb all the chlorophyll present in the leaf and the green color of the leaf disappeared. Wash this leaf with water and put a drop of iodine solution. After a few minutes, the starch present in the leaf turns the iodine from brown to blue-black.


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