Melzer's Reagent
Melzer's Reagent can be used to test spores for amyloid, nonamyloid, and dextrinoid.
- Spores that stain bluish-gray to bluish-black are amyloid
- Spores that stain brown to reddish-brown are dextrinoid
This test is normally performed on white spored mushrooms. If the spores are not light colored, a change will not be readily apparent. It is easiest to see the color change under a microscope, but it is possible to see it with the naked eye with a good spore print.
Read more about this topic: Chemical Tests In Mushroom Identification