Leaf starch test

Leaf starch test

B740/0591

Rights Managed

Caption

Leaf starch test on a variegated leaf (one lacking green chlorophyll in some areas). The leaf on right has been tested for starch, a carbohydrate produced in photosynthesis. The test, with iodine, gives a dark blue colour in the presence of starch and a pale brown colour in its absence. Only the areas of the leaf that contain chlorophyll contain starch, showing that the pigment is essential for photosynthesis.

Release details

Model release not required. Property release not required.

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