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Nectriaceae - Gibberella with 1-Septate Spores
Peter Thompson,
27-10-2014 20:09
I have found a Gibberella species with 1-septate spores, which was growing in dense clusters as well as individual fruit bodies. The substrate is either Clematis or Lonicera; a woody climber.
The microscopy clearly shows the blue and purple cells of the excipulum, by transmitted light.
I wonder if anyone has any species descriptions, a key and / or knowledge of substrate preferences for the 1-septate species of this genus (previously Licea)?
Thank you,
With Best Wishes,
Peter.
Bernard Declercq,
28-10-2014 12:27
Re : Nectriaceae - Gibberella with 1-Septate Spores
Hello Peter,
Gibberella nemorosa (Sacc.) Wollenw. could fit:
Ascomata solitary or in groups of 2-5, superficial , subglobose, up to 0,25 mm diam., becoming cupulate on drying, rugose, blackish, KOH+ black with purple pigment dissolving; spores ellipsoid, 12-16x4,5-7,5 µm, 1-septate, smooth, hyaline; saprophytic on Clematis vitalba and Cytisus nigricans; phen.: VIII-X
Best regards,
Bernard
Gibberella nemorosa (Sacc.) Wollenw. could fit:
Ascomata solitary or in groups of 2-5, superficial , subglobose, up to 0,25 mm diam., becoming cupulate on drying, rugose, blackish, KOH+ black with purple pigment dissolving; spores ellipsoid, 12-16x4,5-7,5 µm, 1-septate, smooth, hyaline; saprophytic on Clematis vitalba and Cytisus nigricans; phen.: VIII-X
Best regards,
Bernard
Peter Thompson,
01-11-2014 11:39
Re : Nectriaceae - Gibberella with 1-Septate Spores
Hello Bernard,
Thank you for your reply and apologies for not responding sooner. I have been distracted by other interesting ascomycetes.
Yes, the spores are of the correct dimensions, septation, hyaline and smooth. The fruit bodies appear to be black until the light from the microscope shows their purple and blue cells. Some fruit bodies show signs of collapse now. They are certainly growing individually and in small groups, sometimes of more than five fruit bodies.
I think that you have provided the correct identification.
With Best Wishes,
Peter.
Thank you for your reply and apologies for not responding sooner. I have been distracted by other interesting ascomycetes.
Yes, the spores are of the correct dimensions, septation, hyaline and smooth. The fruit bodies appear to be black until the light from the microscope shows their purple and blue cells. Some fruit bodies show signs of collapse now. They are certainly growing individually and in small groups, sometimes of more than five fruit bodies.
I think that you have provided the correct identification.
With Best Wishes,
Peter.