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Andreas Franz Wilhelm Schimper was a German biologist. He is the person who discovered leucoplast in 1883. In addition to being a biologist, he was also a phytogeographer.
Leucoplasts are generally colourless. Iodine stains starches blue, so this is probably what you're seeing. Leucoplasts are a type of plastid, meaning they store and produce things in cells. Leucoplasts specifically tend to store starches which is why iodine turns them blue. Hope this helps!
leucoplasts
Leucoplasts are used as storehouses within the cell. Their major function is storage.
Starch
chloroplasts, chromoplasts, and leucoplasts
Plastids that are colorless and found in storage parenchyma and other colorless tissues are referred to as leucoplasts. Most of them function as storage organelles.
the leucoplasts are plastids without color that are storing different substances (such as starch in the potato). you can find leucoplasts in parts of a plant that are subterranean (roots). when potatoes are exposed to the sun the leucoplasts will transform into chloroplasts (so they will become green). i am sorry for my english...
chloroplasts, chromoplasts, and leucoplasts
== == They are a colorless plastid used as a storehouse in a cell.
The content of a cell in plastids - chloroplasts and/or leucoplasts.
starches
they help starch storage