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27-07-2012 19:08

Piet BORMANS Piet BORMANS

Bonjour,Est-ce que cela pouvait être Seynesiella

05-08-2012 15:12

Michel Hairaud Michel Hairaud

Bonjour à tous, Hi to everyone,Je soumets une r

31-07-2012 23:33

Enrique Rubio Enrique Rubio

Ascomata turbinate, not scutellate, that grew on p

05-08-2012 11:41

Alessio Pierotti Alessio Pierotti

Qualcuno degli amici del forum può aiutarmi a tro

02-08-2012 12:13

Raúl Tena Lahoz Raúl Tena Lahoz

Hi to all!Can someone send me a scan of Plant Dise

31-07-2012 22:11

Zoltan Lukacs Zoltan Lukacs

Quelqu'un a une bonne idée?Merci d'avanceAmitiés

30-07-2012 19:50

Enrique Rubio Enrique Rubio

Hi to allThese blackish, sessile and minute ascom

29-07-2012 22:07

Alex Akulov Alex Akulov

Dear FriendsSome days ago in the Ukrainian Carpath

30-07-2012 00:46

Bometon Javier Bometon Javier

Hola, he encontrado este ascomiceto sobre una pied

29-07-2012 20:58

Peter Welt Peter Welt

What kind Pleospora can this be? Found on rabbit d

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Seynesiella juniperi ?
Piet BORMANS, 27-07-2012 19:08
Piet BORMANS

Bonjour,

Est-ce que cela pouvait être Seynesiella juniperi?  

Substrat: Juniperus sp.
Ascomata:  large 150-200 µm, hauteur 125-200 µm.
Asci: 90 - 140 x 22 - 30 µm
Spores: 23-28(30) x 7-9 µm 
Aucune gouttelette observé

Merci de votre aide
Piet Bormans        

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Chris Yeates, 27-07-2012 19:31
Chris Yeates
Re : Seynesiella juniperi ?
Hello Piet

here is a description by R.W.G. Dennis of a Scottish collection; his ascus and spore measurements are much lower than yours - I don't know how significant that is . . .

best wishes
Chris
  • message #19330
Alain GARDIENNET, 27-07-2012 19:31
Alain GARDIENNET
Re : Seynesiella juniperi ?
Bonjour Piet,

Beaucoup d'éléments plaident en faveur de S. juniperi mais tes spores sont légèrement trop grosses pour cette espèce, et en général elles sont moins brunes et une cellule est généralement plus petite que l'autre.
Tes ascomatas sont bien hémisphériques, tu confirmes ? 
Ceci étant, je ne vois pas ce que cela pourrait être autre que cela.
Alain
Alain GARDIENNET, 27-07-2012 19:33
Alain GARDIENNET
Re : Seynesiella juniperi ?
England 1 - France 1

;)
Alain GARDIENNET, 27-07-2012 19:34
Alain GARDIENNET
Re : Seynesiella juniperi ?
Piet, tu peux voir des images ici également :
http://www.springerimages.com/Images/RSS/1-10.1007_s13225-011-0143-8-8

Alain
Chris Yeates, 27-07-2012 19:38
Chris Yeates
Re : Seynesiella juniperi ?
England 1 - France 1

;)


bien sûr . . . .

Hans-Otto Baral, 27-07-2012 20:32
Hans-Otto Baral
Re : Seynesiella juniperi ?
I have the same spore size as Piet

Zotto
  • message #19335
Piet BORMANS, 28-07-2012 21:51
Piet BORMANS
Re : Seynesiella juniperi ?
Maintenant, je suis convaincu que c'est Seynesiella juniperi

Un grand merci à Chris, Alain et Zotto. Aussi à Ascofrance qui nous offre cette possibilité


Piet Bormans

Piet BORMANS, 31-07-2012 12:34
Piet BORMANS
Re : Seynesiella juniperi ?
Bonjour,
Certains ont toujours doute de cette détermination.

La raison : la forme de l'ascomata ne correspond pas à la description de
Müller & Arx 1962. C'est pourquoi j'ai fait quelques photos de clarifier.


Quelle est votre opinion ?

Piet Bormans 

  • message #19359
Hans-Otto Baral, 31-07-2012 13:26
Hans-Otto Baral
Re : Seynesiella juniperi ?
I sent Walter Jaklitsch the problem and he also said that he does not really believe that this is S. juniperi. But for the present he did not have any better solution.

Zotto
Piet BORMANS, 31-07-2012 13:55
Piet BORMANS
Re : Seynesiella juniperi ?
Thank you very much, Zotto
Piet
Adrian Carter, 31-07-2012 15:35
Re : Seynesiella juniperi ?
Hello from PEI Canada:

Just to add to the confusion. Perhaps the Scottish collection to which Dennis refers is in fact a Stomiopeltis species. He mentions this in his book on British Ascomycetes. I also notice that Stomiopeltis juniperi is described in Ellis & Ellis (Microfungi on Land Plants. I'm inclined to go with Seynesiella for your collection. 

You probably have noticed these references but I thought it might be useful, nevertheless.

By the way, I have not seen this species in PEI but I will keep an eye out. 

Sincerely,

Adrian Carter
Piet BORMANS, 31-07-2012 18:00
Piet BORMANS
Re : Seynesiella juniperi ?

Thanks Adrian

This is the host from my garden. Juniperus chinénsis "Pfitzeriana auria"

  • message #19367
Hans-Otto Baral, 01-08-2012 08:16
Hans-Otto Baral
Re : Seynesiella juniperi ?
Strange that Saccardo gives an intermediate spore size, flat lens-shaped ascomata, and Juniperus communis, but he refers to a Spegazzini collection. I do not think that this is the holotype collection of Desmazieres.

Zotto
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Hans-Otto Baral, 03-08-2012 10:02
Hans-Otto Baral
Re : Seynesiella juniperi ?
Dear Piet,

about your fungus on Juniperus again: I did not get a clear picture about the ascomata. Are they longish/columnar? Is the ascus-bearing part in the end, on a stipe? In that case it may be Pododimeria gallica, although in that species ascospores are even more asymmetric and up to 11 µm wide.

On the other hand, one of your images shows parallel rows of cells in the upper peridium, which is in line with thyriothecia-forming fungi. So, Seynesiella is in principle possible.

About Seynesiella juniperi: Wu et al. (Fungal Diversity 51) examined and illustrated a syntype of Desmazieres, i.e. it is original. It shows smaller, lighter and asymmetric ascospores, which is line with Dennis. I am not sure whether they saw the entire range of ascospores. It may be that the material was not quite mature, and that they missed larger and darker brown spores (??).

Müller & Arx give a kind of intermediate spore size of 20-25 x 7-9 µm (probably adapted from Saccardo in Sylloge Fungorum II: 664 (1883)-not Fungi Veneti, who should have copied it from Desmazieres. Unfortunately I do not have Desmazieres´paper. Arnaud (1918), who established Seynesiella, did not mention a spore size. Saccardo also called the spores hyaline to very dilute chlorine.

By the way, Stomiopeltis has small hyaline spores.

Best regards,
Walter Jakllitsch

?

Guy Garcia, 03-08-2012 18:10
Re : Seynesiella juniperi ?
Dears Zotto and Walter,

The Desmazières's description is online. Look at URL:

http://bibdigital.rjb.csic.es/spa/Libro.php?Libro=2204&Pagina=141


Best, Guy 

Piet BORMANS, 06-08-2012 20:33
Piet BORMANS
Re : Seynesiella juniperi ?
Je vous remercie Walter, Zotto et Guy pour cette information.


Piet Bormans