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19-02-2009 16:32

Alain GARDIENNET Alain GARDIENNET

Avez-vous déjà fait des récoltes de Nitschkia c

19-02-2009 14:27

Alain GARDIENNET Alain GARDIENNET

Bonjour à tous, Je cherche à me procurer un art

19-02-2009 10:40

michel hurtu

Bonjour à tous ci joint un coprophile que je n'a

19-02-2009 09:44

Alain GARDIENNET Alain GARDIENNET

Bonjour, I've made a recolt of Mytilinidion acico

18-02-2009 21:54

Roland Labbé

Bonjour ! Voici une planche d'un Asco qui m'est

17-02-2009 17:34

Enrique Rubio Enrique Rubio

Cher tous: Peut etre cette Nectria qui a un hemis

16-02-2009 14:24

Patrice LEFRANCOIS

Bonjour, Voilà j'ai trouvé des nectrias sur un

16-02-2009 04:49

Roland Labbé

Bonjour ! Voici une planche probable d'une Orbi

16-02-2009 04:46

Roland Labbé

Bonjour ! Voici une planche probable d'une Orbi

14-02-2009 16:01

Hans-Otto Baral Hans-Otto Baral

Hello Hyalorbilia anonyma (Rehm) (= Pithyella a

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Anamorph with muriform conidia on Betula seeds
Edvin Johannesen, 07-06-2025 15:39
Edvin JohannesenA friend sent me a few Betula seeds with tiny black fungi on them. It has brown muriform conidia. On the Plant Parasites of Europe website I find no matching species on Betula seeds. Does anyone have a clue?  Thanks!
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  • message #82847
  • message #82847
Edvin Johannesen, 07-06-2025 20:47
Edvin Johannesen
Re : Anamorph with muriform conidia on Betula seeds
Resembling Phragmotrichum platanoidis.
Martin Bemmann, 08-06-2025 09:41
Martin Bemmann
Re : Anamorph with muriform conidia on Betula seeds
Phragmotrichum platanoidis is found on twigs, not on seeds. Though it was found on Betula in Russia (https://www.cabidigitallibrary.org/doi/full/10.5555/19981005353).

Furthermore the conidia are lacking appendages.

Regards

Martin
Edvin Johannesen, 08-06-2025 10:02
Edvin Johannesen
Re : Anamorph with muriform conidia on Betula seeds
Thanks for your reply, Martin.  I suspect that not many people are looking for fungi on seeds, but I may be wrong.  Since P. platanoidis has been found on Alnus catkins, is it unthinkable that it can be found on Betula seeds?

I'm unsure about your comment about appendages.  I see no appendages on the conidia of P. platanoidis in the literature, nor on this collection.

See attched file.
Martin Bemmann, 08-06-2025 10:04
Martin Bemmann
Re : Anamorph with muriform conidia on Betula seeds
Appendages are seen on your second photo.
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Edvin Johannesen, 08-06-2025 10:16
Edvin Johannesen
Re : Anamorph with muriform conidia on Betula seeds
OK, I see what you mean.  I considered this to be remnants of the end cells of adjacent conidia, since these are formed in chains.
Martin Bemmann, 08-06-2025 10:17
Martin Bemmann
Re : Anamorph with muriform conidia on Betula seeds
Yes, you may be right!
Martin Bemmann, 08-06-2025 10:33
Martin Bemmann
Re : Anamorph with muriform conidia on Betula seeds
I just discovered that P.p. was found 2023 in Germany on dead fruits of Acer pseudoplatanus:

Visagie CM et al. (2024). New and Interesting Fungi. 7. Fungal Systematics
and Evolution 13: 441–494. doi: 10.3114/fuse.2024.13.12

see pp. 482-485.
Edvin Johannesen, 08-06-2025 10:56
Edvin Johannesen
Re : Anamorph with muriform conidia on Betula seeds
That's great!  Thanks a lot.
Edvin Johannesen, 08-06-2025 18:28
Edvin Johannesen
Re : Anamorph with muriform conidia on Betula seeds
It has actually been recorded on Betula catkins (seeds?) from Finland:


https://www.gbif.org/occurrence/1122937376
Martin Bemmann, 08-06-2025 19:48
Martin Bemmann
Re : Anamorph with muriform conidia on Betula seeds
Perfect! These catkins are just the "cones" holding the seeds:

https://en.wikipedia.org/wiki/Betula_glandulosa#/media/File:Betula_glandulosa_%C3%96BG_2012-05-28_01.jpg
Edvin Johannesen, 08-06-2025 22:06
Edvin Johannesen
Re : Anamorph with muriform conidia on Betula seeds
Exactly :-)