Dictionary » M » Metachromasia




(1) A property of a dye in which the resulting color of the stain is different from the color of the dye solution

(2) A characteristic of a biological cell or tissue in which the color rendered following staining is different from the color of the dye


For instance, volutin granules in bacteria (e.g. Corynebacterium spp. and Mycobacterium spp.) stain pink with methylene blue.

Word origin: Greek meta (after) + Greek chrôma (color)


  • Metachromasy


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HISTOLOGY - help with identifying connective tissue

... from. I'm pretty sure those granulated cells are Mast cells and the reason they are that colour is because Mast Cells have an absorbance change (metachromasia) when they react with basic dyes and turn from blue to pink/purple etc. SOme people have told me mucosa but there is no epithelium layer ...

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by annakarenina
Tue Oct 17, 2006 8:46 am
Forum: Cell Biology
Topic: HISTOLOGY - help with identifying connective tissue
Replies: 10
Views: 7574

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