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06-12-2019 19:49

Edvin Johannesen Edvin Johannesen

Hi! Tiny, black, oblong stromata with pure white

27-11-2019 16:54

Rasmus Riis-Hansen Rasmus Riis-Hansen

Hi,I hope you can help med with this disc found a

05-12-2019 09:06

Valencia Lopez Francisco Javier

Hola amigosEstoy buscando este trabajo de la Errot

05-12-2019 19:35

Ibai Olariaga Ibarguren

Dear colleagues, I was wondering if anyone could

19-11-2019 18:05

Lothar Krieglsteiner Lothar Krieglsteiner

... under a twig of deciduous tree (likely Quercus

29-06-2011 22:52

Luc Bailly Luc Bailly

Encore trois ascos de la réserve naturelle domani

04-12-2019 13:01

Mirek Gryc

Hello everyoneI inform you in advance that this is

04-12-2019 14:53

Lothar Krieglsteiner Lothar Krieglsteiner

Hello together, does somebody have: DONADINI J.-

03-12-2019 10:36

Thomas Læssøe

Pale, long-stemmed, recalling H. seminis-alni; ap.

24-11-2019 19:03

Mirek Gryc

They grew on plant debris soaked in faeces togethe

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Monilinia on Prunus padus
Johan Myhrer, 14-08-2019 09:30
Collection from central Sweden 2019-08-12, light brown discs araising from blackishbrown mycelium covering the stones from Prunus padus fruits laying on the ground. Spores 6-8x3,5-4µm.

My first thought was Monilinia padi but thats a species of spring with larger spores? Could it be M. fructicola?
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Hans-Otto Baral, 14-08-2019 10:35
Hans-Otto Baral
Re : Monilinia on Prunus padus
the paraphyses contain very refractive VB-guttules which are unknown in Monilinia. Could you please check the iodine reaction and photograph the apical ring if present? I think the spores are uninucleate.

My guess is that it is a Hymenoscyphus.
Johan Myhrer, 14-08-2019 13:21
Re : Monilinia on Prunus padus
Some more pictures. Asci with Lugols solution, spores with pushed contrast.
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Hans-Otto Baral, 14-08-2019 13:54
Hans-Otto Baral
Re : Monilinia on Prunus padus
Yes, clearly Hymenoscyphus-type and spores uninucleate.

Further necessary data include asus base (croziers) and excipulum structure (prismatica?).

I know a Hymenoscyphus species on Cornus seeds, but remember narrower spores for that.
Johan Myhrer, 14-08-2019 14:34
Re : Monilinia on Prunus padus
Ascus on croziers. Excipulum textura prismatica indeed, sometimes almost globulosa. Habitus is not much like Monilinia at all when I compare pictures...
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Hans-Otto Baral, 14-08-2019 21:09
Hans-Otto Baral
Re : Monilinia on Prunus padus
Clearly with croziers. 

I find noting in my database on seeds/fruits of Prunus that might fit. Ciboria aestivalis is the only one, but it is sclerotiniaceous, obviously, when checking data in GenBank.

But I remembered wrong: The Hymenoscyphus on Cornus seeds fits yours in spore size (6-10 x 3-4). I have it as H. corni-maris in my folder Hymenosc Cudoniella. In another folder ("cornicola Asia") is a similar species differing in being without croziers. This folder contains also "Lanzia" glandicola, which might be the same.

Could it be that your seeds belong to Cornus rather than Prunus? - No, sorry, I did not remember your clear photo. We actually have a sequence of the Cornus fungus (ITS), so a comparison with yours would be interesting.

I compared this aggregate also with Gloeotinia and Symphyosirinia, and the latter was suggested to me also by Peter Püwert regarding your sample.

Zotto



Johan Myhrer, 15-08-2019 07:15
Re : Monilinia on Prunus padus
Corni-maris looks very similar! I'm 100% sure about the substrate, a HUGE Prunus padus :-)

Anyone working with these? I would be happy to send a sample for sequencing.

/Johan
Hans-Otto Baral, 15-08-2019 08:47
Hans-Otto Baral
Re : Monilinia on Prunus padus
At some time I intend to clarify this Cornus fungus, but at the moment it is impossible. Various people have the opportunity to do such molecular work, but it is a bit of inflationary today, how many species and samples need sequencing. Important is to keep the dried sample.
Johan Myhrer, 15-08-2019 09:43
Re : Monilinia on Prunus padus
Dried sample will be deposited in Herbarium UPS for future studies :-)

Thank you Zotto!