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30-03-2021 08:34

Joop van der Lee Joop van der Lee

Found on hare dung.I finally managed to visualize

29-03-2021 17:46

Joop van der Lee Joop van der Lee

Found on horse dung.Perithecia: 225-262 um in diam

27-03-2021 19:25

Andgelo Mombert Andgelo Mombert

Bonsoir, Sur branche morte attenante d'Amelanchie

28-03-2021 16:20

Przemyslaw Drzewiecki

Hi,03.07.2020; Hardwood in a significant amount of

25-03-2021 13:38

Ismael Wind

On populus i found these largespored ascos. I thin

27-03-2021 17:06

Josep Torres Josep Torres

Hola.Ejemplares recolectados el 21 de Marzo, sobre

28-03-2021 00:33

Paul Whitehead

Could anyone help me identify/find a pathway to id

27-03-2021 09:11

Enrique Rubio Enrique Rubio

Could someone give me a copy of Hayova and Minter'

26-03-2021 20:19

Juuso Äikäs

These I found today, growing on a thin, fallen bra

26-03-2021 21:13

Daniel Ghyselinck

Found on hardwood, plenty of these long necks aris

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Gibberella sp? on Acer.
Mirek Gryc, 22-03-2021 14:23

Hi.
Many times I found species from this kind but have usually missed conidiophores. This time, however, both forms occur at the same time almost in every sample collected so I think conidiophores belongs to this species.
I looked through all the available articles on Gibberella but nothing could match. Finally, I found a drawing of Gibberella intricans, Wollenweber, H.W. Fusaria Autographic Delineata, EDN 3: I, 660-1100: 810 (1930).
In principle, all features match my collection.
Initially measured the spores overripe, I did not fit their width. I found a less mature fruiter whose spores with sizes correspond to those from the engravings.
Relevant note is that the spores are in most 3-septata (rarely 5-septata).

Spores;
(27.7) 27.8 - 31.2 (31.5) × (5.3) 5.9 - 7.3 (7.5) µm
Q = (3.9) 3.94 - 5.27 (5.3) ;
Me = 29.1 × 6.6 µm ; Qe = 4.4
Conidia
31.3 - 37.2 × 4.6 - 4.89 (4.9) µm
Q = (6.8) 6.84 - 7.6 ;
Me = 33.7 × 4.7 µm ; Qe = 7.2


However, I am wondering a very poor reaction to KOH?
What is your opinion on it?
greetings
Mirek

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Bernard Declercq, 22-03-2021 17:49
Bernard Declercq
Re : Gibberella sp? on Acer.
Hi Mirec,

This is clearly a Fusarium ss. str.(syn.: Gibberella).
Compare with lignicolous species Fusarium lateritium Nees, ascospores as well as 3(5)-septate conidia seem to match.

Bernard
Mirek Gryc, 22-03-2021 19:43
Re : Gibberella sp? on Acer.
Hi Bernard.
Again, I had to look a bit of literature about it and compare my.
It seems to me that you are right. Features very good fit to the genre that you offered.
Thank you very much
Mirek