Asco sur Populus - Forum ASCOFrance

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Asco sur Populus

Patrice TANCHAUD, 01-02-2024 23:24

Bonsoir,

récolte sur branche de peuplier au sol. Apothécies 1-3 mm. Asques 85-90 µm à sommet IKI négatif. Spores 9,5-13 x 2,8-3,2 µm.

Merci d'avance pour vos suggestions.

Patrice

doc1-0001.pdf

Hans-Otto Baral, 02-02-2024 05:40

Re : Asco sur Populus

Hmm, I fear more data are necessary. I considered Calycina lactea and C. subparilis, but both have strongly hemiamyloid apical rings.

Could you do a photo of the ascus apex in IKI, best in dead state?

C. lactea has croziers and only 4 developed spores and the apos are distinctly stalked. C. subparilis is simple-septate and 8-spored and the apos are very short-stalked.

Patrice TANCHAUD, 02-02-2024 23:14

Re : Asco sur Populus

Thanks Zotto. I put a preparation in KOH, then in Lugol, but I have no reaction from the top of the asci, I think my Lugol (from 2018) may be expired.

Otherwise, the apothecia are poorly stipitated. And there are 8 spores per asci, but it is not easy to highlight and photograph.

Patrice

Hans-Otto Baral, 03-02-2024 10:29

Re : Asco sur Populus

Difficult to say, and whether some have only 6 large spores could also be due to senescence.

Patrice TANCHAUD, 03-02-2024 10:32

Re : Asco sur Populus

OK. I will try to let it ripen by leaving the piece of wood in a cool place outside.

Thanks.

Patrice

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