19-06-2020 21:45
Castillo Joseba
me mandan esta muestra seca reco0lectada en Phragm
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Pavol PaloHello friends, may I ask you for help ? Fruitb
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Hardware Tony
Not sure if anyone can help here, as rather unusua
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Stefan JakobssonHere a Lachnum I am not quite sure about. It is wh
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Alvarado Cordobes Manuel
Haciendo fotos a una planta de Opuntia megacanthaÂ
18-06-2020 23:47
Edvin Johannesen
Apothecia 1-2 mm, convex when moist, concave or wr
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Ethan CrensonHello all,I have a difficult situation with this p
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Bernard CLESSE
Bonsoir à toutes et tous,J'ai reçu d'une amie ce
17-06-2020 08:27
Garcia SusanaHola, He encontrado estos peritecios que crecÃan
Diaporthe or related? On dogwood twig.
Edvin Johannesen,
04-06-2020 19:30
I did not draw the black lines here - the fungus did!
The perithecia are quite deeply embedded, sometimes more than one, but few, in a group. Spores very large, but variable in length; 35-65 x 8-10 microns, 1-septate, slightly constricted at the septum, filled with variably sized droplet, bearing ca. 4 microns long hyaline appendages at the poles. Asci irregularly biseriate. Ascus apparatus ring-shaped. Spores measured an photographed in water. Phase contrast used in order to see the spore appendages.
Are we in Diaporthaceae (Diaporthe) or Gnomoniaceae (Pseudodiaporthe) or somewhere else?
Thanks in advance.
Edvin Johannesen,
04-06-2020 19:31
Re : Diaporthe or related? On dogwood twig.
Some microscopic details.
Edvin Johannesen,
04-06-2020 19:33
Re : Diaporthe or related? On dogwood twig.
The dogwood species is Swida sericea (=Cornus stolonifera).
Eduard Osieck,
08-06-2020 22:25
Re : Diaporthe or related? On dogwood twig.
Hi Edvin
Compare with Diaporthe tessella which species has such large, appendaged spores and stromatic line. Nice drawing of spores and stroma in Wehmeyer 1933 (Diaporthe world monograph). A link to this book is given on www.verspreidingsatlas.nl/0740020 (see tab Artikelen).
Eduard
Compare with Diaporthe tessella which species has such large, appendaged spores and stromatic line. Nice drawing of spores and stroma in Wehmeyer 1933 (Diaporthe world monograph). A link to this book is given on www.verspreidingsatlas.nl/0740020 (see tab Artikelen).
Eduard
Edvin Johannesen,
08-06-2020 22:28
Re : Diaporthe or related? On dogwood twig.
Thanks a lot, Eduard - I will check :)