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Yellow discomycete
Per Vetlesen,
08-12-2015 11:37
I found this Ascomycete on a log of a dead hardwood tree (Acer platanoides?) in Stange, Norway.
Spores: 20.9 [25.6 ; 27.8] 32.5 x 5.7 [6.6 ; 7] 7.8 µm, Q = 2.9 [3.8 ; 4.2] 5 ; N = 29 ; C = 95%. Me = 26.7 x 6.8 µm ; Qe = 4
Asci: 107.9 [120.2 ; 128.4] 140.7 x 14.5 [15.4 ; 16.1] 17 µm. Q = 6.7 [7.6 ; 8.2] 9.1 ; N = 16 ; C = 95%. Me = 124.3 x 15.7 µm ; Qe = 7.9
Thanks in advance for help!
Regards
Per
Martin Bemmann,
08-12-2015 11:53
Re : Yellow discomycete
Hei Per,
most probably Pezicula acericola. Try Lugol without KOH. I bet the apical apparatus will turn bright red (hemiamyloid).
Regards
Martin
most probably Pezicula acericola. Try Lugol without KOH. I bet the apical apparatus will turn bright red (hemiamyloid).
Regards
Martin
Per Vetlesen,
08-12-2015 13:30
Re : Yellow discomycete
Hei Martin.
Yes, you are right, it became red (redder than in the photo). I have looked at data about P.acericola on Internet and it seems to fit very well with my disco. As far as I can see it is not recorded in Norway before!
Thank you very much!
Regard
Per
Per Vetlesen,
13-12-2015 22:10
Re : Yellow discomycete
Hi Martin,
I have now checked it up with Gerard J. M. Verkley's work: A monograph of the genus Pezicula and its anamorphs, and the descriptions/comments by Irina Morozova/Stip Helleman: http://www.ascofrance.com/forum/17358/pezicula-acericola-aesculea-what-is-the-difference
Just to be sure I have re-measured the ascospores: L/W = 2.9 [4 ; 4.3] 5.4 ; N = 100. I found several bluntly hooked spores, and with the asci's length 120.2 - 128.4 µm and paraphyses' apical cell less than 4,5 µm in diameter, it fits very well with Pezicula aesculea.
Thank you for guiding me to the genus.
And thanks to KÃ¥re Homble for helping me identifying it.
Regards
Per
I have now checked it up with Gerard J. M. Verkley's work: A monograph of the genus Pezicula and its anamorphs, and the descriptions/comments by Irina Morozova/Stip Helleman: http://www.ascofrance.com/forum/17358/pezicula-acericola-aesculea-what-is-the-difference
Just to be sure I have re-measured the ascospores: L/W = 2.9 [4 ; 4.3] 5.4 ; N = 100. I found several bluntly hooked spores, and with the asci's length 120.2 - 128.4 µm and paraphyses' apical cell less than 4,5 µm in diameter, it fits very well with Pezicula aesculea.
Thank you for guiding me to the genus.
And thanks to KÃ¥re Homble for helping me identifying it.
Regards
Per