Penicillium/Talaromyces with deep red pigments on CZ/MEA

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  • Hi , I found an interesting Penicillium s.l. (could be Talaromyces) that was growing on a very specific substrate. Inside my cupboard was an old cartoon of red wine that, tilted and it was slightly leaking. A dull green mould was growing on the wine-soaked cartoon box. I managed to culture a pure colony on PDA, MEA, and CZ


    On CZ and MEA it released a very deep red pigment - so amazing!! On PDA no pigment was released.


    I wonder if one can help me with the identification (or suggest some literature to consult)


    I have not yet examined the material under the microscope as first I wish to have a pure colony to save for the future. The slow-growing mould (at room temp of 29C!) is dull green at the centre, then fading and changes to a cream border and white margin. There are a few options but not sure what it is yet.


  • After reading some literature, Talaromyces purpurogenus is my best guess. It is used as food colouring. Another clue is that it did not forned red pigments on PDA and I saw that this is so for this species


    Safety Evaluation of Fungal Pigments for Food Applications
    Pigments play a major role in many industries. Natural colors are usually much safer when compared to synthetic colors and may even possess some medicinal…
    www.mdpi.com


    My hypothesis is that Penicillium purpurogenum pigment was used in this cooking wine, and some spores might have escaped in the wine. (BTW cheap cooking wine). It used the soaked carton box as a, substrate to grow.


    Amazing if this is the case.


    When I'm back home from hospital, I carry out some microscopical investigations.

  • So I am still working on this Penicillium sp., extracted from the cartoon of wine which on Oat meal agar and especially on Malt Extract Agar, the colonies form a deep, bright red exudate. I have examined the penicillate conidiophores which are biverticillate and rather slender and it is matching with P. pupurogenum is close enough. Still, maybe there are similar species to consider.

  • Hallo Steve,


    for my part, I have never before heard about colouring foot with fungi. :thumbup:


    Fascinated, Martin