Leaf starch test

Leaf starch test

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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.

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Keywords: analysing, analysis, botanical, botanical science, botany, chlorophyll, duo, iodine, leaf, leaves, nature, pair, results, starch, test, testing, treatment, two, variegated leaf, variegated leaves

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