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02-09-2025 10:28

Castillo Joseba Castillo Joseba

De ayer en madera muy podrida de haya (Fagus)A ver

31-08-2025 19:41

Enrique Rubio Enrique Rubio

Hi to someone.I need to download this issue of Sve

02-09-2025 11:34

Thomas Læssøe

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

31-08-2025 17:32

Michel Hairaud Michel Hairaud

Bonjour, Pas d'identité trouvée pour cette réc

01-09-2025 08:42

François Corhay

Un ami, conservateur d'une RN en Belgique, m'a adr

31-08-2025 14:34

Thomas Flammer

I have found a Rutstroemia on abt. 2000 m on Alnus

29-08-2025 19:04

Thomas Flammer

Spores 21.2 - 26.2 x 8.3 - 11.3 µm - Q: 2.20 - 2.

30-08-2025 18:29

Joaquin Martin

Hi,I found this undetermined ascomycete on broadle

28-08-2025 17:24

Thomas Flammer

I know, that this is not the real topic of this fo

29-08-2025 05:16

Francois Guay Francois Guay

I think I may have found the teleomorph of Dendros

« < 1 2 3 4 5 > »
Asco sp.
Yannick Mourgues, 11-05-2008 14:24
Yannick MourguesBon, je change de récolte alors ...

Cet asco a été trouvé sur écorces de branches mortes de marronniers (aesculus) tombées au sol.
Il se présente sous la forme d'un disque perçant l'écorce, à marge blanches dentelée dressée, à hyménium granuleux grisâtre.

Spores fusiformes/cylindriques, parfois arquées, en général 5-6 cloisons, bisériées, 40-58x4-5 um.
Asques IKI+, cylindriques, 100x10-16 um
Paraphyses larges de 1-2 um, étroitement agglomérées entre elles au sommet par une sorte de gel, hyaline mais devenant vertes dans le Lugol (voir photo ci-après), et septées.
Pas réussi à voir la Textura.

De quoi s'agit-il ?

Yannick
  • message #4659
Yannick Mourgues, 11-05-2008 14:24
Yannick Mourgues
Re:Asco sp.
Vu de plus près...
  • message #4660
Yannick Mourgues, 11-05-2008 14:25
Yannick Mourgues
Re:Asco sp.
Paraphyses vertes dans Lugol + agglomérées au sommet par gel
  • message #4661
Yannick Mourgues, 11-05-2008 14:25
Yannick Mourgues
Re:Asco sp.
Un dessin des spores...
  • message #4662
Yannick Mourgues, 11-05-2008 14:42
Yannick Mourgues
Re:Asco sp.
J'en ferai bien Karstenia (cryptodiscus) rhopaloides ...

Qu'en pensez-vous ?

Yannick
Hans-Otto Baral, 11-05-2008 17:36
Hans-Otto Baral
Re:Asco sp.
Hi Yannick

Yes, I think this is Karstenia rhopaloides. The spores are a bit long (I rarely found up to 51 µm in length), but their shape excludes K. idaei. I would be interested about the content of the living spores. I attach an image of typical spores of rhopaloides. Some uncertain collections had a large central LB in each cell, but typically there are only small peripheral LBs.
  • message #4664
Hans-Otto Baral, 11-05-2008 17:39
Hans-Otto Baral
Re:Asco sp.
A median section of the margin would also be helpful. Karstenia has always this dense parallel texture of periphyses going vertically towards the hymenium (see an image of Piotr Perz). Finally IKI provokes a hemiamyloid reaction of the whole asci in Karstenia (first blue, at higher concentration redbrown). Maybe your Lugol is too diluted?

Amities
Zotto
  • message #4665
Yannick Mourgues, 11-05-2008 22:18
Yannick Mourgues
Re:Asco sp.
Hi Zotto.
I wasn't able to make a median section of the margin. Sorry. My Lugol has one year so may be it's not concentrated as it must be. That's why I have seen only a blue reacton.
For all spores I have seen, there was a large central, sometimes two LB in each cell. In my collection, I haven't seen any spores with small peripheral LBs. Here is attached a picture (bad pict. sorry) of that.
Thank's again.
Yannick
  • message #4666
Hans-Otto Baral, 11-05-2008 23:14
Hans-Otto Baral
Re:Asco sp.
Hi Yannick
yes, these guttules do not look typical for rhopaloides. Difficult to say. These Karstenias are all xerotolerant, therefore, if you have not used a dryer you can still study living spores in water.
Your apos look rather large, what is their diameter?

Zotto
Yannick Mourgues, 11-05-2008 23:16
Yannick Mourgues
Re:Asco sp.
diameter = 1 mm
Yannick Mourgues, 11-05-2008 23:23
Yannick Mourgues
Re:Asco sp.
Zotto,

Have you already found this specie on Aesculus hippocastaneus ?

Yannick
Hans-Otto Baral, 12-05-2008 15:03
Hans-Otto Baral
Re:Asco sp.
Yannick,

no, I have a lot of substrates but this one not: bark, rarely wood of still attached (rarely fallen) branches (rarely fruits) of Acer, Cedrus, Clematis, Cornus, Corylus, Cotinus, Crataegus, Fraxinus, Fagus, Juglans, Lonicera, Pinus, Populus, Prunus, Robinia, Rubus, Sambucus, Salix, Symphoricarpos, Tilia, Ulex, Viburnum, herbaceous stems of Ephedra, Lupinus, Reynoutria, I-XII, Central Europe, colline to montane (30-670m)
Zotto