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Nectria on Salix
Jenny Seawright,
02-04-2015 22:41
Hello all, I found a patch of Nectria on a living branch of Salix cinerea in damp woodland - perithecia yellow becoming orange and then red, slightly darker at the apices, the surfaces appearing rough but not strongly warted. Spores were hyaline, 1-septate, (15)17-20 x 7µm.Â
Using Ellis & Ellis Nectria veuillotiana seemed a good possibilty until I compared the perithecia with those shown here:
http://www.ascofrance.fr/search_recolte/2149
Once again assistance appreciated!
With regards,
Jenny
Christian Lechat,
03-04-2015 06:42
Re : Nectria on Salix
Hi Jenny,
 Are the ascospores ornamented or smooth?
Your fungus fits better Thelonectria discophora.
Best wishes,
Christian
 Are the ascospores ornamented or smooth?
Your fungus fits better Thelonectria discophora.
Best wishes,
Christian
Jenny Seawright,
03-04-2015 23:44
Re : Nectria on Salix
Hi Christian - my first reply disappeared so this is the next attempt!
Thank you - the texture and apices of the AscoFrance images of Thelonectria discophora correspond perfectly with what I was seeing down the microscope.
"Are the ascospores ornamented or smooth"
I wasn't quite sure what I should be looking for but have added some images in Cotton Blue.
Attempted images of a perithecia section - fortunately someone has kindly offered to do a 'proper' section for me......
With regards,
Jenny
Thank you - the texture and apices of the AscoFrance images of Thelonectria discophora correspond perfectly with what I was seeing down the microscope.
"Are the ascospores ornamented or smooth"
I wasn't quite sure what I should be looking for but have added some images in Cotton Blue.
Attempted images of a perithecia section - fortunately someone has kindly offered to do a 'proper' section for me......
With regards,
Jenny
Christian Lechat,
04-04-2015 06:03
Re : Nectria on Salix
Jenny,
your image (from left) suggests that the ascospores observed in water are spinulose. This characteristic fits well to T. discophora.
Best gegards,
Christian
your image (from left) suggests that the ascospores observed in water are spinulose. This characteristic fits well to T. discophora.
Best gegards,
Christian
Jenny Seawright,
04-04-2015 09:53
Re : Nectria on Salix
Thank you very much Christian
Jenny
Jenny