Potato Tissue

 

View starch grains in potato tissue. Though you can't tell with a light microscope, these are enclosed in plastids.

 

View series of images of the various stages of a starch-containing leucoplast transforming into a chloroplast. This makes explicit that the starch grains are each enclosed in a plastid.

Starch grains will rotate the plane of polarization of polarized light. They glow when seen through crossed polaroids.

 

Starch treated with iodine turns purple.

 

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