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29-08-2010 11:43

4-spored Calycina like
Marja Pennanen

Hello, in spite of huge amounts of unfinished spe

28-08-2010 21:42

Aquatique s/ Picea abies.
Luc Bailly Luc Bailly

Trouvé dans une rivière ardennaise lors des JME.

28-08-2010 12:35

Annulusmagnus?
Hans-Otto Baral Hans-Otto Baral

On a Fagus log lying in mud of pond, soc. Orbilia

27-08-2010 20:35

Geopora pellita
Dirk Strobelt

Hello, I found under Pinus sylvestris on sandy

27-08-2010 13:59

Hymenoscyphus like on herbs
Marja Pennanen

Now, that I learned the shape of the spores H. sc

27-08-2010 11:04

White peculiarity on mosses
Marja Pennanen

Hello, is spite of unstudied old specimen, I went

27-08-2010 07:53

Rehm
Alain GARDIENNET Alain GARDIENNET

Bonjour, Quelqu'un aurait-il le descriptif de l'

26-08-2010 20:39

eupropolella?
Ismael Wind

On a dead branch of buxus i found black spots on t

26-08-2010 07:51

Massariosphaeria typhicola sur Clematis vitalba ? ou alors Montagnula anthostomoides ?
Alain GARDIENNET Alain GARDIENNET

Bonjour à tous, Je vous donne quelques informati

24-08-2010 16:54

Lamprospora
Lothar Krieglsteiner Lothar Krieglsteiner

in the Plitvicka jezera National park I found a sm

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Leptosphaeria on grass
Gernot Friebes, 19-07-2010 15:50
Hi again,

here I have the second collection and with this find I did not come to any result at all.

It grew on grass lying in a little stream together with Mollisia hydrophila. The ascomata are immersed, the spores are 28-32 x 4-5.5 µm, 6-celled with the third cell slightly swallen, the ostiolum is filled with +- angular cells and not with periphyses and the peridium of big, brown cells. Within some ascomata the lower half of the peridium was much lighter than the upper half.

I would be thankful for any help!

Best wishes,


Gernot


ascomata:
  • message #12388
Gernot Friebes, 19-07-2010 15:51
Re:Leptosphaeria on grass
micros (scale=10 µm):

  • message #12389
Gernot Friebes, 19-07-2010 15:51
Re:Leptosphaeria on grass
sections (scale=10 µm):

  • message #12390
Gernot Friebes, 19-07-2010 15:51
Re:Leptosphaeria on grass
sections (scale=10 µm):
  • message #12391
Gernot Friebes, 19-07-2010 15:52
Re:Leptosphaeria on grass
ostioles (scale=10 µm):
  • message #12392
Alain GARDIENNET, 19-07-2010 16:00
Alain GARDIENNET
Re:Leptosphaeria on grass
It coulb be Phaeosphaeria fuckelii ?
I will look at this hypothesis.
Alain
Alain GARDIENNET, 19-07-2010 16:07
Alain GARDIENNET
Re:Leptosphaeria on grass
In that genus, it is frequently useful to observe ascospores in ink. Sometimes, P. fuckelii shows a sheath on ascospores.
Have you seen it ?
Nevertheless, I think it could be P. fuckelii.
Alain
Gernot Friebes, 19-07-2010 16:09
Re:Leptosphaeria on grass
I have material left and I will check on a possible sheath. I will write if I have seen something!

Gernot
Gernot Friebes, 20-07-2010 18:46
Re:Leptosphaeria on grass
I looked at some ascospores in Indian ink and most of them didn't have a sheath although I also found some spores were a sheath was more or less well visible. Here I show you the best photo I could take. Would you say that P. fuckelii is sure, now that I observed a sheath on at least some spores?

Best wishes,

Gernot

  • message #12409
Alain GARDIENNET, 21-07-2010 16:26
Alain GARDIENNET
Re:Leptosphaeria on grass
Very good !
I think it's quite sure P. fuckelii.
Best wishes,
Alain
Gernot Friebes, 21-07-2010 19:39
Re:Leptosphaeria on grass
thanks a lot, Alain!