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01-06-2025 09:37

Charles Aron Charles Aron

Hi All, I found this Octospora growing with liver

05-07-2025 12:38

Åge Oterhals

I found this pyrenomycetous fungi in pine forest o

04-07-2025 20:12

Josep Torres Josep Torres

Hello.A fungus growing on the surface of a trunk o

20-06-2025 08:33

Josep Torres Josep Torres

Hello.Small, blackish, mucronated surface grains s

28-06-2025 16:00

Josep Torres Josep Torres

Hello.A tiny fungus shaped like globose black grai

04-07-2025 12:43

Castillo Joseba Castillo Joseba

me mandan el material seco de Galicia (España) 

03-07-2025 18:40

Castillo Joseba Castillo Joseba

me mandas el material seco de Galicia (España) re

03-07-2025 20:08

Francois Guay Francois Guay

I found this interesting yellowish asco growing on

01-07-2025 23:37

Josep Torres Josep Torres

Hello.A Pleosporal symbiotic organism located and

02-07-2025 17:26

Yanick BOULANGER

BonjourRécolté sur une brindille au fond d'un fo

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Spores of Leotia lubrica are septate?
Masanori Kutsuna, 17-09-2014 03:33
Hello everyone,

According to some literatures (Dennis, Breitenbach and Kranzlin ...),
ascospores of Leotia lubrica have 3 or more septa at maturity.
But I can't see any septa in Japanese materials.
What should I do to see septated spores?
Does anyone have microphotos of septated spores?

Masanori Kutsuna
Hans-Otto Baral, 17-09-2014 08:55
Hans-Otto Baral
Re : Spores of Leotia lubrica are septate?
Leotia and Microglossum do not develop septa at all. I never saw them. A frequent mistake with herbarium material is that plasma bridges between the big oil drops are taken for septa (they are called "pseudosepta"). But with some experience or when staining with Congo Red I think they can safely be distinguished from true septa. With living spores there is no possibility to recognize any septation. The spores do not germinate easily, so it is possible that under optimum conditions the spores might indeed get septate during germination.

I remember a drawing by Chadefaud who illustrated eguttulate, clearly septate spores for Leotia. I never understood it, maybe it was a misidentification. Te drawing in Breitenbach & Kränzlin looks indeed convincing, with both septa and big oil drops. But it was made in the dead state, and I am sceptical about it.

Zotto
Masanori Kutsuna, 17-09-2014 09:24
Re : Spores of Leotia lubrica are septate?
Thank you very much for your detailed explanations, Zotto.

Kutsuna