Photosynthesis: Starch Test
Testing for Starch in Leaves Using Iodine
Observe how we test for starch production in leaves through photosynthesis. Follow each step to see how iodine solution changes color in the presence of starch.
Current Step:
This experiment demonstrates how to test for starch in leaves. Starch is a product of photosynthesis.
The Science Behind Starch Testing
1. Boiling the Leaf:
Boiling in water kills the leaf cells and breaks down cell membranes, allowing iodine to penetrate and react with any starch present.
2. Iodine Test:
Iodine solution turns blue-black in the presence of starch. This color change is a reliable indicator of starch production through photosynthesis.
3. Interpreting Results:
A blue-black color indicates starch is present (positive for photosynthesis). Yellow-brown indicates no starch (negative result).
