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26-04-2025 16:01

Jacques Fournier Jacques Fournier

J'ai le regret d'informer les membres du forum qui

26-04-2025 07:15

Dragiša Savic

Hello everyone,the lichen is Candelariella aurella

25-04-2025 22:48

Gustaf Fredell Gustaf Fredell

Hello,I hope everything is going well. I couple mo

18-04-2025 23:16

Robin Pétermann Robin Pétermann

Bonjour, Voici une probable Mollisia, genre que j

24-04-2025 21:35

Thorben Hülsewig

Hi there,last week i could found this asco on an S

25-04-2025 17:24

Stefan Blaser

Hi everybody, This collection was collected by J

25-04-2025 09:33

Josep Torres Josep Torres

Ascomata shaped like deformed black grains, measur

24-04-2025 21:53

Lothar Krieglsteiner Lothar Krieglsteiner

... 15.7.24 in the Alps. There were many asci with

23-04-2025 20:16

Miguel Ãngel Ribes Miguel Ángel Ribes

Good afternoon Looking for Octospores / Lamprospo

24-04-2025 15:03

Henri Koskinen

Hello, I collected this Lasiobolus 22.04. near Hel

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Mycospharella??
Martin Mullett, 19-12-2011 20:22
Hello,

I was wondering if anybody could confirm what I think this is?  The substrate is a 1 year old Corsican pine needle (Pinus nigra subsp. laricio), entirely necrotic and abscised.  The fruit body was sub epidermal, erumpent, black and a few millimetres in diameter.  The asci are not clearly visible but the ascospores are.  The ascospores are 2 - 3.5 um wide and about 13 -19um long.  I think this is Mycospharella.  Does anyone think so as well or can maybe identify to species? 
Many thanks in advance,

Martin

 

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Alain GARDIENNET, 20-12-2011 22:59
Alain GARDIENNET
Re : Mycospharella??
Dear Martin,
The first question is important of course.
For the identification, if it's really a Mycosphaerella ( I think it is), you can use the  website : http://www.cbs.knaw.nl/mycosphaerella/defaultinfo.aspx?Page=Home
You should be successful with it.
Alain
Martin Mullett, 21-12-2011 18:21
Re : Mycospharella??
Thank you Rene and Alain!!

I am glad you think it is Mycosphaerella.  I wanted to be sure before continuing.
Given the locality and that there was significant Dothistroma infection on other needles and also the size of the ascospores I am now much more confident that it is Mycosphaerella pini!  Interesting as this is the first time the teleomorph has been observed in the UK!

Thank you for your help!

Martin
Alain GARDIENNET, 21-12-2011 19:20
Alain GARDIENNET
Re : Mycospharella??
Martin,
It is probably not M. pini.
In CBS- website (Stalpers'one, I have given the link), ascospores size is 10-12 x 3-3.5 µm (so a ratio L/l very different). Perhaps it's another species. In Europe, more than 5 are recorded on Pinus: pini, pinicola, pinifolia, conygena, dearnesii, and perhaps other ones. But is it really a Mycosphaerella ? Could you describe hamathecium and could you show asci ?
Alain
Martin Mullett, 22-12-2011 19:22
Re : Mycosphaerella??
Hello,

Hmm, now I am thoroughly confused J   You are right Alain, there seem to be nine Mycosphaerella species on Pinaceae, of which at least five have been found in Europe.  But is seems there is at least some partial synonmy.  Are not M. acicola and M. dearnessii the same?  And according to Evans (1984) there seems to be some confusion between M. pinicola and M. gibsonii.  There also seem to be two entries for M. pini on Mycobank.  One entry gives the ascospore dimensions as 10-12 x 3-3.5 (http://www.cbs.knaw.nl/mycosphaerella/BioloMICS.aspx?Table=Mycosphaerella%20sensu%20lato%20teleomorphs&Rec=1489&Fields=All) the other as 11-17 x 3-4.5 (http://www.cbs.knaw.nl/mycosphaerella/BioloMICS.aspx?Table=Mycosphaerella%20sensu%20lato%20teleomorphs&Rec=1490&Fields=All) . 

I will try to have another look at the sample but it doesn't look promising L .  Sorry for the lack of data, but does it look like it could be something other than Mycosphaerella (unfortunately only from info so far given)?  The asci seem to disintegrate or are not very visible at all. :(
Would anybody happen to have the original description of M. pini?  Munk, A., 1957, Dansk botanisk Arkiv 17(1): 312  Maybe it will offer some insights?


Thank you again for your help and comments!!


Kind regards,


Martin