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17-09-2025 19:43

Philippe PELLICIER

Sur branche morte de Mélèze. Les ascospores sphÃ

18-09-2025 08:35

Edmond POINTE Edmond POINTE

Bonjour amis mycologues,Trouvé sur moquette de ch

17-09-2025 16:14

Philippe PELLICIER

Apothécies enterrées, fermées au début puis s'

17-09-2025 10:50

Heather Merrylees

Hi there!I am hoping for any advice on the identif

11-09-2025 16:57

Jason Karakehian Jason Karakehian

Our revision of Marthamycetales (Leotiomycetes) is

16-09-2025 12:53

Philippe PELLICIER

Pézizes de 1-4 mm, brun grisâtres, sur les capsu

03-09-2025 12:44

Enrique Rubio Enrique Rubio

Hi to somebody.I would like to know your opinion o

15-09-2025 14:40

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hello.I'm searching for a digital copy of the seco

14-09-2025 22:16

Philippe PELLICIER

Apothécies petites jusquà 3 mm, oranges, avec de

13-09-2025 14:01

Thomas Flammer

dark brown apothecia, splitIKI-Spores biguttulate

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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