Iodine/ Tinctures of iodine/Betadine_turns leaf into bluish black
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Iodine/Tincture iodine/ Betadine-turns leaf into bluish black colour it proves that leaf has a starch. If the starch is present in leaf if we add these solutions to leaf after doing some experiments the leaf changes into bluish black colour if the leaf does not have starch the colour not change.
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