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Une hélotiale sur aiguilles de Larix
Michel Hairaud,
11-09-2021 12:37
Bonjour,Je ne parviens pas à trouver de nom pour cette hélotiale récoltée sur feuilles au sol de Larix en Vanoise à 1750 m d'altitude .
Apos urcéolées < 0,5 mm à cellules marginales plus claires
Asques H+, IKI + de type Calycina 95-110 x 12-13
Spores biguttulées, hétéropolaires, 17-20 x 5,5-7 (guttules -> 4 µm)
Paraphyses sans VBs évidentes dans H2O mais faiblement colorées par le CRB
Cellules marginales soit obtuses x 10 µm, soit élancées , hyalines, x 5 µm
Ectal prismatique avec des masses peu refringentes
Medulla intricata d'hyphes parallèles.
Merci pour toute aude apportée Amitiés. Michel
Hans-Otto Baral,
11-09-2021 21:08
Re : Une hélotiale sur aiguilles de Larix
Hi Michel
can you send a photo of the amyloid ring please?
I could nit find anything similar in my database when considering larix needles and this spore size.
Zotto
Michel Hairaud,
11-09-2021 22:33
Re : Une hélotiale sur aiguilles de Larix
Thanks,
Here it is in IKI
The striking feature in spores is the guttulation
Michel
Here it is in IKI
The striking feature in spores is the guttulation
Michel
Hans-Otto Baral,
11-09-2021 23:30
Re : Une hélotiale sur aiguilles de Larix
Hmm, this ascus apex is broadly conical with a truncate tip. This does not sound to me like Calycina, but could well relate to Rutstroemiaceae, although being comparatively thin-walled. No idea of a genus or species.
Michel Hairaud,
13-09-2021 11:26
Re : Une hélotiale sur aiguilles de Larix
Merci encore,
I had not paid enough attention to the ascus truncate aspect so I have tried new pics from an exsic sample to get more precisions about the IKI reaction shape.
I canot really find here a typical Rutstroemiaceae reaction. Can you ?
I can see that such spore shape and content can be found in that familly, though.
Because of the hairy margin I would have placed it in the former Nannfeld Hyaloscyphaceae but could not find any matching genus in the now Hyaloscyphaceae nor in the Pezizellaceae.
Amitiés
Michel
I had not paid enough attention to the ascus truncate aspect so I have tried new pics from an exsic sample to get more precisions about the IKI reaction shape.
I canot really find here a typical Rutstroemiaceae reaction. Can you ?
I can see that such spore shape and content can be found in that familly, though.
Because of the hairy margin I would have placed it in the former Nannfeld Hyaloscyphaceae but could not find any matching genus in the now Hyaloscyphaceae nor in the Pezizellaceae.
Amitiés
Michel
Hans-Otto Baral,
13-09-2021 11:52
Re : Une hélotiale sur aiguilles de Larix
very good! It really resembles Sclerotiniaceae s.l. much more than Calycina, but is not fully typical. I have the same problem as you, so I placed your find in my Helotiales incertae sedis folder.
Michel Hairaud,
14-09-2021 10:35
Re : Une hélotiale sur aiguilles de Larix
At least, we can place it in Helotiales -:)
If we have some euros left, we might see if sequencing would bring some light on it
Here is the collection data :
- MH 120821 on Larix sp. dead leaves on drained regularly overflooded ground.
- France, Modane, Parc National de la Vanoise, Vallon de Polset , near the ruisseau de St Bernard, alt 1980 m . Leg N. Vanvooren.
Amitiés et merci encore.
Michel
If we have some euros left, we might see if sequencing would bring some light on it
Here is the collection data :
- MH 120821 on Larix sp. dead leaves on drained regularly overflooded ground.
- France, Modane, Parc National de la Vanoise, Vallon de Polset , near the ruisseau de St Bernard, alt 1980 m . Leg N. Vanvooren.
Amitiés et merci encore.
Michel
Hans-Otto Baral,
14-09-2021 11:07
Re : Une hélotiale sur aiguilles de Larix
Thanks! Is your number bulid from the date?
Michel Hairaud,
14-09-2021 11:21
Re : Une hélotiale sur aiguilles de Larix
Collection date is 2021 09 01
(My ref is the 12th studied collection in the Alp foray started in August ) Michel
(My ref is the 12th studied collection in the Alp foray started in August ) Michel