Why does starch stay in the leaf after the leaf is decolourized?
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The leaf was flaccid (soft) as cell membranes were ruptured and turgor pressure was lost. Chlorophyll is a green pigment and so masks the colour change of the iodine test for starch. Chlorophyll needs to be removed from the leaf i.e. theleaf needs to be ' decolourized' for changes to be observed.
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