Accès membres

Mot de passe perdu? S'inscrire

19-05-2026 19:47

Andreas Millinger Andreas Millinger

Hello dear community,found this species the second

19-05-2026 12:55

Hardware Tony Hardware Tony

After checking Gminder and Otto's library I cannot

19-05-2026 10:27

Patrice TANCHAUD

Bonjour, récolte récente sur terre retournée i

18-05-2026 12:43

Sylvie Le Goff

Bonjour à tousPuis je avoir votre aide sur ce que

19-05-2026 14:56

Åge Oterhals

I found this white cushion-formed ascomycete on ro

18-05-2026 19:49

William Slosse William Slosse

Good evening all,recently I found a portion of a S

18-05-2026 10:13

Lieve Deceuninck Lieve Deceuninck

Dear forum members,I identified this as the teleom

17-05-2026 22:09

éric ROMERO éric ROMERO

Bonjour tous, Je sollicite vos avis pour ce Molli

17-05-2026 19:05

Thomas Flammer

I have found this tiny 200 ym cup shaped apothecia

17-05-2026 16:41

Margot en Geert Vullings

We found this Lachnum on an old Rubus stem.Fruitbo

« < 1 2 3 4 5 > »
Mould which easily break when mounted in water or Stains
Stephen Martin Mifsud, 02-12-2017 08:36
Stephen Martin MifsudHi, I got this mould as a contaminant while studying another microfungus inoculated from a decaying log. On various media (PDA, SDA, Czapek) it forms an olive green growth  (3cm / 14C / 7 days) with a yellowish tinge. First indication is that of a Penicillium sp. but under the microscope I could not make heads and tails. The prime character I can describe is that the phialides and hypha of the conidiogenesis apparatus breaksing up into  constituent pieces giving this polymorphic observation of spores, hyphae and septate(?) phialides of various shapes and sizes. These septate hyphae have tiny projections indicating that they used to bear spores and hence part of the fruiting organ.

Rarely I see spores in short chains but often they are very hygrophobic and entrapped in tiny bubbles hindering the view of the conidiaphore+apparatus. Is there a specific mould with this character - breaking out easily? I strongly doubt it is a  Penicillium as I managed to see a fruiting part with budding spore.
  • message #51431
  • message #51431
  • message #51431
  • message #51431
  • message #51431
  • message #51431
  • message #51431
Angel Pintos, 02-12-2017 09:32
Angel Pintos
Re : Mould which easily break when mounted in water or Stains
Looks like Cladosporium sp.

regards

Angel
Joey JTan, 02-12-2017 17:03
Re : Mould which easily break when mounted in water or Stains
Yes this is a Cladosporium sp. The conidial chains easily fragment and can be seen best by making a tape mount. Gently press a small piece of transparent tape against the colony and mount it in water (place it on a drop of water, don't just stick it to the slide itself). You should see the chains still connected. The larger, 2-celled, shield-like ramoconidia are indicative of Cladosporium and give rise to branching conidia chains.
Stephen Martin Mifsud, 07-12-2017 23:29
Stephen Martin Mifsud
Re : Mould which easily break when mounted in water or Stains
Hi thank you for your replies. It took time to come back but I did not forget you. The tape method did a lovely job. I cut a small squarish piece of tape using tweezers and clean scissors, laid the sticky surface on the outer part of the colony, gave a very gentle press (like a touch rather than a press), placed the sticky surface of a drop of water on a mounting slide and mounted under a microscope. It was interesting to observe that this species had clamp junctions. 

Now, I could see the conidiogenesis structure very well and I drew a quick illustration :-) 

I don't think I dare to follow the Cladosporium key of a meticulous monograph to reach species level!
  • message #51529
  • message #51529
  • message #51529
  • message #51529