Sur (on) Yucca - Forum ASCOFrance

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Sur (on) Yucca

Piet BORMANS, 28-06-2013 22:53

Est-ce que quelqu'un peut m'aider à déterminer cet ascomycéte ?

Récolté aujourd'hui sur une feuille morte de Yucca. Ascomata rond, très nombreux.

Diamètre ascomata : 150 à 200 µm

Asci : 55 – 75 x 12 – 20 µm.

Spores : 17 – 21(23) x 6 - 8 µm., elles ne sont pas colorées et il n'y a pas de cloisonnées

Merci d'avance de votre aide.

Piet Bormans

Piet BORMANS, 05-12-2013 22:06

Re : Sur (on) Yucca

Question before the holidays (maybe a bad time) - no response

I try again. Maybe someone can help?

Piet Bormans

Maren Kamke, 05-12-2013 23:33

Re : Sur (on) Yucca

Hi Piet,
do you have a closeup-photo of the perithecia?
Regards Maren

Alain GARDIENNET, 06-12-2013 07:49

Re : Sur (on) Yucca

Peut-être bien Guignardia istriaca.
Alain

Piet BORMANS, 06-12-2013 09:48

Re : Sur (on) Yucca

Close up photos

Piet BORMANS, 15-12-2013 20:07

Re : Sur (on) Yucca

Thanks Maren and Alain for your response. The spores form don't fits well with Guignardia istriaca. My knowledge is insufficient to determine this species. Maybe someone is interested, then I will send it to him.

Regards,
Piet

Paul Cannon, 17-12-2013 19:19

Re : Sur (on) Yucca

This may be a member of the Glomerella cingulata aggregate (now considered as Colletotrichum species as we now only use one name per species). Are you sure the host plant is Yucca? It looks like Phormium tenax to me. There are two species of Colletotrichum reported from Phormium in Europe, C. kinghornii and C. phormii (see Damm et al. Studies in Mycology 73, 2012). Neither has a teleomorph linked to them, but I would not be surprised to see that one occurs.

Best wishes

Paul

Piet BORMANS, 02-01-2014 21:10

Re : Sur (on) Yucca

Sorry, I'm a little too late. Thanks a lot for your reply. De host is Yucca sp. (Y. recurvifolia or Y. filamentosa ?). I add a photo I made earlier.

A happy new year!

Piet

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