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27-06-2020 13:21

Hardware Tony Hardware Tony

I wondered if anyone could help me with this ascom

04-07-2020 14:34

Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Hello, I would like to ask you for help with idet

03-07-2020 17:47

Thomas Læssøe

see: https://svampe.databasen.org/observations/10

03-07-2020 21:06

Castillo Joseba Castillo Joseba

me mandan el material seco,, recolectado en plante

03-07-2020 20:54

Castillo Joseba Castillo Joseba

me mandan el material seco recolectado en rama de

03-07-2020 22:51

Viktorie Halasu Viktorie Halasu

Hello,I'd like to ask for help with a lichen. In w

02-07-2020 21:45

Castillo Joseba Castillo Joseba

me mandan el material seco, recolectado en  tallo

02-07-2020 07:56

Garcia Susana

Hola, Agradecería vuestra ayuda para la identifi

02-07-2020 13:33

Garcia Susana

Hola, He recogido estos apotecios que crecían en

02-07-2020 16:05

Thomas Læssøe

see: https://svampe.databasen.org/observations/10

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Nectria on Salix bark
Enrique Rubio, 29-01-2016 01:39
Enrique Rubio

Hi again


These small (up to 0.35 mm), superficial, hairy, scattered perithecia grew on Salix bark, The ental layer of the walls turns lilac in KOH 10%, Ascospores verrucose. I don't know its anamorphic stage.


Have you  some idea for help me?


Thanks in advance

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Christian Lechat, 29-01-2016 06:00
Christian Lechat
Re : Nectria on Salix bark
Hi Enrique,
very nice specimen and images!
Maybe I know this species, I have a specimen collected by J.-P. Priou on Ulex, which resembles to yours. It could be a new genus in the Nectriaceae, which is in the course of study.

Best regards,
Christian

Enrique Rubio, 29-01-2016 09:33
Enrique Rubio
Re : Nectria on Salix bark

Hi Christian


Is the lilac reaction of the internal perithecial layer present in your specimens?


Thanks a lot

Christian Lechat, 29-01-2016 10:07
Christian Lechat
Re : Nectria on Salix bark
Yes enrique, inner region of ascomatal wall turning purple in KOH and yellow in lactic acid.

Christian
Enrique Rubio, 29-01-2016 10:21
Enrique Rubio
Re : Nectria on Salix bark
Thanks Christian
Marian Jagers, 22-02-2017 23:07
Marian Jagers
Re : Nectria on Salix bark
It looks like, I have found these funny perithecia too, on dead branches of Cytisus scoparius too (Enschede, The Netherlands). They are about the same sizes.
Ascospores are verrucose, mature a bit pink, some 2 times septated, 23 – 31,5(-37) x 9 11(– 12,5) µm. Asci J-, 8-spored, 80-94x14-16 µm. The innerwall purple in KOH.
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Christian Lechat, 23-02-2017 05:25
Christian Lechat
Re : Nectria on Salix bark
Hi Marian,
your specimen seems identical to those collected by Jean Paul Priou on "pyreno" on Ulex and by Enrique on Allantoporthe tessella on Salix.

Is your specimen fungicolous?

Phylogenetic analysis places this fungus in the genus Macroconia (Nectriaceae).

All the best,
Christian
Marian Jagers, 23-02-2017 09:42
Marian Jagers
Re : Nectria on Salix bark
Hi Christian,

Sorry, I forgot to mention this. Indeed on stroma of Diaporthe inaqualis? or perhaps a Didymospaeria sp.? Both are rather common on this branches.
Most of the perithecia are empty so it is difficult to check without much dammage. First I hope to culture some more specimens of this Macroconia.
Thanks.

Marian
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