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Pezicula-like on Hedera
Martin Bemmann,
03-06-2013 21:18
Dear all,yesterday I found these tiny ascomata (~0.2 mm in dm.) on a dead Hedera helix climbing a tree but cut at the bottom a considerable time ago. It was easy to pull down and the fruitbodies were found at the upper tips of the plant from a height of ca. 5 m above ground.
None of the asci showed its normal spore contents but most of them were filled by a granulose to globulose contents (microconidia?). The IKI-reaction of the apical apparatus was faint red (hemiamyloid). Nevertheless some allantoid spores could be observed floating in the medium. Some of them germinating, some of them one-septate.
My first thought was on Pezicula, but spores are way to small, (8.8)9.3-12.5x3.2-4 µm, and I found no species recorded on Hedera (Verkley).
Anyone with an idea?
Best regards
Martin
Pezicula-02VI2013-asci-05-0001.jpg
Stip Helleman,
04-06-2013 07:55
Re : Pezicula-like on Hedera
Hallo Martin,
the texture of the fruitbodies looks macroscopically not like Pezicula to me, did you consider Claussenomyces ? C. prasinulus has 3 septate spores at (over)maturity and also forms conidiospores.
Best wishes,
Stip
the texture of the fruitbodies looks macroscopically not like Pezicula to me, did you consider Claussenomyces ? C. prasinulus has 3 septate spores at (over)maturity and also forms conidiospores.
Best wishes,
Stip
Stip Helleman,
04-06-2013 19:11
Re : Pezicula-like on Hedera
Hallo Martin,
Laetinaevia is another idea.
Stip
Laetinaevia is another idea.
Stip
Martin Bemmann,
04-06-2013 19:18
Re : Pezicula-like on Hedera
Hi Stip,
this is what I wanted to suggest next! You are right with your doubts with Pezicula, but the cushion-shaped apothecia of Claussenomyces prasinulus do not fit either.
I was looking since then after members of the Naevioideae and still I am.
I will try to access Hein's work of 1976 and study this. Maybe it brings me ahead...
Best regards
Martin
this is what I wanted to suggest next! You are right with your doubts with Pezicula, but the cushion-shaped apothecia of Claussenomyces prasinulus do not fit either.
I was looking since then after members of the Naevioideae and still I am.
I will try to access Hein's work of 1976 and study this. Maybe it brings me ahead...
Best regards
Martin
Stip Helleman,
04-06-2013 20:42
Re : Pezicula-like on Hedera
Hallo Martin,
I will send you Hein 1976 in a minute
Herzlich,
Stip
I will send you Hein 1976 in a minute
Herzlich,
Stip
Martin Bemmann,
04-06-2013 21:12
Re : Pezicula-like on Hedera
Thank you very much, Stip!
But the plate on p. 25 is disillusioning! My fungus is neither errumpent nor sessile but shortly stipitate.
First I will try to do a section (a hard task with this tiny ascomata) before I proceed.
Best regards
Martin
But the plate on p. 25 is disillusioning! My fungus is neither errumpent nor sessile but shortly stipitate.
First I will try to do a section (a hard task with this tiny ascomata) before I proceed.
Best regards
Martin
Martin Bemmann,
09-06-2013 19:59
Re : Pezicula-like on Hedera
Hi Stip,
Laetinaevia is a good path to proceed although there are only few fruiting on woody substrates (none on Hedera yet).
I did not manage to make a section but I did a slide with Brilliant Cresyl Blue that shows spores inside the asci. I believe that these spores are germinating inside the asci while being one-septate.
I hope Zotto has something in his database that will match or help.
Best regards
Martin
Laetinaevia is a good path to proceed although there are only few fruiting on woody substrates (none on Hedera yet).
I did not manage to make a section but I did a slide with Brilliant Cresyl Blue that shows spores inside the asci. I believe that these spores are germinating inside the asci while being one-septate.
I hope Zotto has something in his database that will match or help.
Best regards
Martin
Stip Helleman,
10-06-2013 00:33
Re : Pezicula-like on Hedera
Hi Martin,
your collection did remind me a bit of L uvidula but yours seems to have a different spore L/W ratio. For the right picture I think there are germinating spores too. It is a pity I don't know DBASE 4.
your collection did remind me a bit of L uvidula but yours seems to have a different spore L/W ratio. For the right picture I think there are germinating spores too. It is a pity I don't know DBASE 4.
Stip?
Hans-Otto Baral,
10-06-2013 22:52
Re : Pezicula-like on Hedera
Hi Martin
I have presently no idea at present. L. uvidula is IKI-. A Parorbiliopsis perhaps? Would it be possible to male a section of the excipulum?
Zotto
I have presently no idea at present. L. uvidula is IKI-. A Parorbiliopsis perhaps? Would it be possible to male a section of the excipulum?
Zotto
Martin Bemmann,
11-06-2013 21:46
Re : Pezicula-like on Hedera
Hi Zotto,
no, I did not manage a section yet. The remaining apos are too tiny and they fruit on loose bark (very uncomfortable to cut). Some new apos are growing now in the moist bag. I revisited the locus and collected some meters of the Hedera and inspected them under the dissecting microscope. But I did not find further colonies.
Regards
Martin
no, I did not manage a section yet. The remaining apos are too tiny and they fruit on loose bark (very uncomfortable to cut). Some new apos are growing now in the moist bag. I revisited the locus and collected some meters of the Hedera and inspected them under the dissecting microscope. But I did not find further colonies.
Regards
Martin