23-07-2017 15:46
Spooren Marco
Hello,Does someone has : Booth, C. 1967 Pleospora
22-07-2017 20:27
Andgelo Mombert
Bonsoir à tous,Sur feuille morte de Quercus robur
20-07-2017 23:41
Bernard CLESSE
Bonsoir à tous,Voici un asco jaunâtre trouvé su
Conidia on Fagus
Steffen Lorenz,
23-07-2017 18:32
I found these conidia on Fagus sylvatica (a thick slice of the stem). They resemble Prosthecium pyriforme but this species is restricted to Acer.
The conidia are muriform, have a 1,5 µm thick hyaline sheath and measure 32-38 x 14-17 µm (without sheath).
Is it possible to determine the species?
Regards
Steffen
Hermann Voglmayr,
24-07-2017 15:15
Re : Conidia on Fagus
Hi Steffen,
Concerning the bark features seen in your illustration the substrate clearly is not Fagus but Acer pseudoplatanus.
So you are right, the species is from the Stegonsporium pyriforme group, there are three cryptic species which can only be reliably identified by sequence data.
See Voglmayr, H., Jaklitsch, W. M., 2014. Stilbosporaceae resurrected: generic reclassification and speciation. Persoonia 33: 61-82, available for free download at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4312938/
Hermann
Steffen Lorenz,
24-07-2017 18:47
Re : Conidia on Fagus
Hello Hermann,
thank you for your answer. I think, you are right with the substrate.
Looking at the picture I was in doupt too, but I was too sure with Fagus. On top of that the conidia seemed a bit slender (width 17-20 µm according to Ellis & Ellis). But your and Mr. Jaklitsch's article confirm my measurements.
Are you interested in this collection for your studies?
Regards
Steffen
thank you for your answer. I think, you are right with the substrate.
Looking at the picture I was in doupt too, but I was too sure with Fagus. On top of that the conidia seemed a bit slender (width 17-20 µm according to Ellis & Ellis). But your and Mr. Jaklitsch's article confirm my measurements.
Are you interested in this collection for your studies?
Regards
Steffen
Hermann Voglmayr,
25-07-2017 11:07
Re : Conidia on Fagus
Yes, can easily happen to be too sure about host identification.
Many thanks for your offer of the material - however, the Stegonsporium project is finished, so I don't need additional specimens.
Best wishes, Hermann
Many thanks for your offer of the material - however, the Stegonsporium project is finished, so I don't need additional specimens.
Best wishes, Hermann