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17-04-2012 05:11

lachnum literature
Baeza Yajaira Baeza Yajaira

hello averybody im looking for this paper, i hope

17-04-2012 02:28

Diplodia on Vaccinium myrtillus
Chris Yeates Chris Yeates

Hello everyonewhile examining dead stems of Vaccin

16-04-2012 20:20

'Botryosphaeria' on Populus nigra branches
Enrique Rubio Enrique Rubio

Hi to allI have collected these stromata with blac

13-04-2012 18:50

Pseudomassaria?
Enrique Rubio Enrique Rubio

Hi to all:We have collected these small perithecia

17-04-2012 00:06

Microthyrium sp. on Sorbus aucuparia bark
Peter Thompson

I found a small group of thyriothecia fruit bodies

01-02-2012 12:44

Pseudombrophila dentata?
Christiane Baethcke Christiane Baethcke

Hallo everybody,I have watched this forum quite so

15-04-2012 18:31

interesting Lophiostoma on Fagus
Björn Wergen Björn Wergen

Hi all,I have found a very interesting lophiostomo

14-04-2012 15:46

Aiuto ! Cercasi letteratura...
Alessio Pierotti Alessio Pierotti

In questi ultimi mesi ho lavorato alla catalogazio

13-04-2012 20:18

Searching for Literature
Uwe Lindemann Uwe Lindemann

Hello,I have problems to obtain copies of the foll

12-04-2012 13:57

Recherche littérature
René Dougoud

Chers Tous,Je recherche les publications ci-desous

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Calycina conorum
Yannick Mourgues, 01-02-2008 23:49
Yannick MourguesBonsoir.

J'ai observé que Calycina conorum rougissait fortement à la blessure. Est-ce que l'un d'entre vous saurait pourquoi ? Quelle est la réaction chimique responsable de cela ?

I have watched that Calycina conorum becomes strongly reddening when hurted. Do you know why ? What is the chemical process ?

Merci par avance.
Yannick
  • message #3989
Perz Piotr, 02-02-2008 09:39
Re:Calycina conorum
Hi Yannick

I thint this is oxidation of VBs i paraphyses, marginal- & excipulum cells.

Pimpek
Hans-Otto Baral, 02-02-2008 11:38
Hans-Otto Baral
Re:Calycina conorum
Yes, it is a wide-spread property in Helotiales and always the result of oxidation of refractive vacuoles. Typical of Lachnum, Bryoscyphus, some of Calycina etc. I think it has to do with benzol rings in which the double bindings change through oxidation and therefore get coloured. It is always a lethal process so that redbrown paraphysis or hair cells are never coloured as long as they are alive.

We have so important vital characters like VBs and we know so little about thier chemical background. It would be an interesting field of research for chemistry.

Zotto