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Biodiversity > BCERN
> CDE & DDE
> Glossary > Chemical Reactions
Chemical Reactions
- KOH: A general test that may cause several colour changes. Colour
reaction to 15% KOH may be throughout the tissue or localized. Normal
negative reaction is a bleaching or light yellowing.
- Melzer's: Amyloid: blue or dark blue reaction. Dextrinoid: purple
or reddish-brown reaction (Baral 1987). Normal negative reaction is
a light yellowish-brown staining.
- Sulfovanillin: Laticifers may stain blue, red or almost black, reacts
with Lactarius and Russula. Normal negative reaction is
a light pink staining.
- Toluidine Blue: Stains most fungi. A positive reaction of hyphal walls
may be purple, blue or pink.
- PDAB: A positive reaction is purplish-red, e.g. with Tricholoma
(Ovrebo 1980)
- FeCl2: A positive reaction is black or greenish-blue, e.g. with Boletinus
and Chroogomphus (Singer 1986)
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