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30-04-2015 21:52

Jenny Seawright Jenny Seawright

Hello all, another query from dead Phragmites stem

30-04-2015 23:38

Bernard CLESSE Bernard CLESSE

Sur tige pourrie d'ortie, en compagnie de Calloria

29-04-2015 14:19

Enrique Rubio Enrique Rubio

Hi to everybody I would know your opinion about t

23-04-2015 20:19

Eduard Osieck

Hello all,Minute hyaline perithecia (0.05-0.06 mm)

30-04-2015 22:44

Bernard CLESSE Bernard CLESSE

Sur tige pourrie d'Urtica dioica.a) spores ± cyli

30-04-2015 16:42

Garcia Susana

Hi all:Can someone send me a pdf of the article:Sh

30-04-2015 09:30

Alex Akulov Alex Akulov

Dear friendsAmong the old samples, which are store

30-04-2015 12:00

Katarina Pastircakova

Hi there, Does anyone have these papers? Bagyana

29-04-2015 15:42

Leandro Sánchez Leandro Sánchez

Sur Abies, diamètre max 1mmSpores  16,20-18,60 /

28-04-2015 21:58

Jenny Seawright Jenny Seawright

Hello all, Found on Phragmites australis (?) at th

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Microthyrium on Phragmites?
Jenny Seawright, 30-04-2015 21:52
Jenny SeawrightHello all, another query from dead Phragmites stems....

Small black pseudothecia, sections under the microscope making me wonder Microthyrium but with abundant conidia (c. 4 x 1 µm) and no spores.

I found mention of M. nigroannulatum on Phragmites but without spores I'm lost!

With regards
Jenny


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Spooren Marco, 01-05-2015 11:05
Spooren Marco
Re : Microthyrium on Phragmites?
Hello Jenny,

First of all:I doubt if it is Phragmites you have on the first picture, and second, ; I see a lot of conidia at your last picture ?

Best,
Marco
Jenny Seawright, 01-05-2015 19:50
Jenny Seawright
Re : Microthyrium on Phragmites?
Hello Marco,

Thank you for your reply - if not Phragmites I'm not sure what the substrate might have been but possibly a Poaceae stem among the Phragmites?

Conidia were very abundant in all sections I examined so presumably an anomorph?

With regards,
Jenny
Spooren Marco, 01-05-2015 20:39
Spooren Marco
Re : Microthyrium on Phragmites?
Hello Jenny,

  First, I think You have a Phoma or something like that;the texture of your pycnidium is angular, not striate.About the matrix, I do not think it is a Phragmites because of the obvious epidermis on your picture.Is it wooden?

Best,
Marco
Jenny Seawright, 01-05-2015 21:04
Jenny Seawright
Re : Microthyrium on Phragmites?
Hello Marco,

No, definitely a stem, and it appears hollow on the inside - photograph below of the piece collected (top of image) with two sections of Phragmites below.

Sorry I've no better images of the pycnidia, they varied slightly in shape and some appeared to have a small central protuberance.

A bin job methinks!

With regards,
Jenny
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Chris Yeates, 01-05-2015 22:15
Chris Yeates
Re : Microthyrium on Phragmites?
Don't worry Jenny!
Coelomycetes can be frustrating at the best of times and those on Poaceae are among the worst ;-)
best wishes
Chris
Jenny Seawright, 01-05-2015 22:32
Jenny Seawright
Re : Microthyrium on Phragmites?
Thanks Chris - I'm building up a substantial collection of bin jobs!
Jenny