Pseudomassaria? - Forum ASCOFrance

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Pseudomassaria?

Enrique Rubio, 13-04-2012 18:50

Hi to all:
We have collected these small perithecia (or pseudothecia?) up to 0.5 mm in diam. inmersed under the bark of branches of indeterminate hardwood (Acer or Prunus, not Tilia). Ostioles are very nconspicuous.

The spores are very unequally 2-celled. Asci seem to have a very inconspicuous apical apparatus but I'm not sure. They are Melzer negative.
I think in the genus Pseudomassaria but their asci are described as Melzer positive...
What do you think?
Many thanks again

Yannick Mourgues, 13-04-2012 19:26

Re : Pseudomassaria?

Hi Enrique !
Very nice pictures !
Have you tried Barr's key on the genus Pseudomassaria in Mycologia 56 (6), 1964. Page 843 ?
You can read it on Cyberliber.
Yannick

Enrique Rubio, 13-04-2012 19:51

Re : Pseudomassaria?

Hi Yannick.
Yes. I have read Barr's manuscript but I continue without seeing the light!

Thank you
Enrique

Alain GARDIENNET, 13-04-2012 22:17

Re : Pseudomassaria?

Why not Pseudomassaria chrondrospora ? Because of K- ? It would have been a good suggest else. Apical ring is small and refractive, so perhaps you haven't seen amyloid reaction ?
Alain

Yannick Mourgues, 13-04-2012 23:17

Re : Pseudomassaria?

Alain, as-tu connaissance de récoltes sur un autre support que Tilia ?
Yannick

Alain GARDIENNET, 14-04-2012 09:13

Re : Pseudomassaria?

Non, pas à ma connaissance. Je regardais les photos d'Enrique dans le Melzer, et ça reste énigmatique. Mais peut-être que c'est autre chose que P. chrondrospora...
Dans les Hyponectriaceae apiosporés J-, il y a les Apiothyrium, et ce n'est pas cela, et certains Pseudomassaria qui ne collent pas non plus avec celui-ci. C'est pourquoi je m'interrogeais sur l'amyloïdité de cette récolte.
Bonne journée,
Alain

Enrique Rubio, 14-04-2012 12:15

Re : Pseudomassaria?

Cher amis:
Je suis bien sur que le Melzer est negative et qu'il n-y-a pas des Tilia
J'ai vu á ce link http://www.springerimages.com/Images/RSS/1-10.1007_s13225-011-0104-2-8
des images de P. chondrospora semblebles a mon recolte. A le pied de page ont dit que les asques sont IKI (-).

Avez vous le suivant article?: Hyde, K.D., Frohlich, land Taylor, lE. (1998a). Fungi from palms. XXXVI. Reflections on unitunicate ascomycetes with apiospores. Sydowia 50: 21-80. Peut etre les images sont de ce travail.
Merci de votre aide.

Yannick Mourgues, 14-04-2012 12:57

Re : Pseudomassaria?

Here you can find it : http://www.landesmuseum.at/datenbanken/digilit/?litnr=32178?
Yannick

Enrique Rubio, 14-04-2012 18:09

Re : Pseudomassaria?

Thank you, Yannick

Enrique Rubio, 17-04-2012 16:43

Re : Pseudomassaria?

Hi to all:

Finally I confirm you that the sustrate is a Tilia platyphyllos single tree situated to a 100 m of the lying branches that I have found.
By the other hand Walter Jaklitsch (pers. com.) thinks my collection fits well with Pseudomassaria chondrospora as Alain was thinking too.
Many thanks to all
Enrique

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