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10-09-2025 23:53

Marcel Heyligen Marcel Heyligen

Found on Robinia pseudoacasia together with Diapor

10-09-2025 17:18

Blasco Rafael Blasco Rafael

Hola, encontre este estiercol de vaca estos apotec

07-09-2025 08:19

Josep Torres Josep Torres

Hello.Tiny pinkish discomycetes, photographed and

09-09-2025 12:07

Edmond POINTE Edmond POINTE

Bonjour amis mycologues,Trouvé sur moquette de ch

08-09-2025 19:07

ruiz Jose

Hola me pasan esta recolecta en madera de fraxinus

03-09-2025 21:59

Philippe PELLICIER

La Léchère, Col de la Madeleine, alt 1970m, au s

06-09-2025 21:40

David Chapados David Chapados

Hi, Does somebody know the genus that has those b

07-09-2025 11:34

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello,I have identified this fungus as Hymenoscyph

02-09-2025 11:34

Thomas Læssøe

https://svampe.databasen.org/observations/10527903

05-09-2025 09:32

Nicolas VAN VOOREN Nicolas VAN VOOREN

Bonjour, hi everyone,Do you know where the fungari

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Purple parasite?
Harald Homa, 02-02-2025 15:07
Harald HomaHello everyone!

While working through the finds from last Sunday, I found groups of fruiting bodies of Lachnum virgineum whose hymenium was discolored purple.


Since I do not remember any "chemical abuse" of the find, I suspect a parasite as the cause of the coloration.


Does anyone know this discoloration and its cause?


Many thanks and best regards


Harald

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Lothar Krieglsteiner, 02-02-2025 15:09
Lothar Krieglsteiner
Re : Purple parasite?
Hello Harald,
I think the coloration is due to growth of bacteria.
Yours, Lothar

David Malloch, 02-02-2025 15:53
David Malloch
Re : Purple parasite?
This would be easy to check microscopically. It would be interesting to see a section through the ascoma where the purple meets the yellow.
Harald Homa, 03-02-2025 16:11
Harald Homa
Re : Purple parasite?
Hello Lothar, hello David!

Following David's suggestion, I tried to make cross-sections of the infected fruiting bodies.
Here is the result with 16x and 100x objective.


It looks to me as if the hymenium is dissolved by the parasite and only the hairs, subhymenium and excipulum remain.
The obviously slimy layer of the parasite seems to have rod-like structures - bacterial parasite?


Best regards


Harald

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David Malloch, 03-02-2025 16:28
David Malloch
Re : Purple parasite?
Hello Harald and Lothar,

I think Lothar is correct; the purple material looks like bacteria. The cells are very narrow for a fungus.

Nice photos: very clear.

David
Thorben Hülsewig, 04-02-2025 12:11
Re : Purple parasite?
Hi Harald, Lothar and David

This parasite is very common on Lachnum and Phaeohelotium, but not known which bacterium it is.
Maybe it could grow also on other Ascomycota.
I find it very exciting that the color changes.

best regards,
Thorben
Lothar Krieglsteiner, 04-02-2025 12:20
Lothar Krieglsteiner
Re : Purple parasite?
Yes, and on Capitotricha and else. We are not the first who note that. Zotto also noted it, I learned it from him (here? - or wherever)
Piotr Perz, 04-02-2025 12:32
Re : Purple parasite?
I saw it on Antinoa juniperinella.
Regards, Pimpek