Accès membres

Mot de passe perdu? S'inscrire

28-07-2011 18:31

Alex Akulov Alex Akulov

Dear FriendsToday I made the pdf file of Velenovsk

25-12-2019 17:54

Valencia Lopez Francisco Javier

Hola a todos/asEstas supuestas pezizas estaban en

12-07-2015 00:05

Nedim Jukic Nedim Jukic

This one from the same locality as the previous on

12-11-2019 10:32

Miguel Ãngel Ribes Miguel Ángel Ribes

Hi againExactly at the same place than my previous

28-08-2014 18:36

Rubén Martínez-Gil Rubén Martínez-Gil

Hola a todos. Subo unas fotos de un asco que enco

31-05-2026 22:53

éric ROMERO éric ROMERO

Bonjour tous, Je n'ai pas d'idée pour cette esp

30-05-2026 21:12

Philippe PELLICIER

Sur branche de mélèze (Larix) près de la neige,

31-05-2026 10:35

Hulda Caroline Holte

Hello,I collected this species growing on a rather

25-05-2026 16:35

Bernard CLESSE Bernard CLESSE

Bonjour à toutes et tous,J'ai trouvé récemment,

29-05-2026 15:35

daniel FERRE

Bonjour à tous,Je voudrais votre aide pour cette

« < 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