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03-05-2025 12:43

Matthias Reul Matthias Reul

Hi together, Maybe someone has an idea about this

02-05-2025 13:29

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Bonjour, j'aimerais savoir s'il y a eu des public

03-05-2025 18:35

Edmond POINTE Edmond POINTE

J'ai  connu Michel au début de ma passion pour l

08-07-2023 19:24

Juuso Äikäs

These Mollisia fruitbodies were growing on a twig

02-05-2025 08:45

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Bonjour, existe-t-il un pdf d'un Glossarium polygl

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Tony Moverley

A Monilinia type fungus has recently been collecte

01-05-2025 20:11

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello, today I have collected a tiny ascomycete g

01-05-2025 11:25

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Bernard CLESSE Bernard CLESSE

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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