Accès membres

Mot de passe perdu? S'inscrire

14-09-2019 21:53

Maria Plekkenpol

Holland, 07-09-2019. In riverclay area on soil (ol

14-09-2019 18:16

Edvin Johannesen Edvin Johannesen

Rather large apothecia (up to 12 mm) on dead wood,

15-09-2019 09:11

Castillo Joseba Castillo Joseba

De ayer en bosque de  hayas y abetos,   posible

15-09-2019 01:46

Valencia Lopez Francisco Javier

Hola a tod@sAdjunto fotos de unas Tricharinas sp,

14-09-2019 15:46

William Slosse William Slosse

In the coastal dunes of Ter Yde, Belgium I found a

07-09-2019 22:15

Castillo Joseba Castillo Joseba

de hoy en KK de vacunoVeo dos tipos de esporasA ve

05-09-2019 11:03

Simon Kennedy

I would be grateful, if anyone could let me have a

13-09-2019 20:37

Guy Buddy

This small cup (1-2mm) was found fruiting from a h

13-09-2019 09:22

Angel Pintos Angel Pintos

Hello, I have tried to find this article on the we

13-09-2019 07:32

Josep Torres Josep Torres

Hola.Hongo fotografiado anteayer sobre unas agalla

« < 1 2 3 4 5 > »
Paraphyses IKI reaction in Scutellinia
Perz Piotr, 03-02-2007 23:10
Hi,

I have question about paraphyses IKI reaction in genus Scutellinia. Sometimes paraphyses stain in IKI green - it means they have carotenoids. Sometimes there is no IKI reaction - also paraphyses does not contains carotenoids.

How is the name for violet-lila reaction? Here paraphyses of Scutellinia pseudotrechispora (Schröt.) Le Gal in IKI

  • message #1406
NC NC, 04-02-2007 10:10
Re:Paraphyses IKI reaction in Scutellinia
Bonjour,
J'ai déjà observé cette réaction violette avec le Lugol par exemple avec Scutellinia crucipila. Je pense que la réaction (carotene à l'extrémité des paraphyses)en vert foncé (vert-bouteille) s'arrete par manque de concentration en iode (??) et le mélange orange + vert foncé donne cette couleur lilas. Dans ton cas une préparation sans eau, seulement avec IKI donne t-elle toujours du violet?
Amicalement
Robert
Hans-Otto Baral, 04-02-2007 11:54
Hans-Otto Baral
Re:Paraphyses IKI reaction in Scutellinia
I have actually observed the same in "Scutellinia sp." (see my paper on Lugol versus Melzer, mycotaxon 29: 428, 1987): when adding IKI (Lugol) to a water mount, the colour reaction of the paraphyses changes from greyish-violet to grey.olive or grey-brown. The violet reaction is seen at an iodine concentration of 0.05-0.1% while the olive appears at 0.1-0.2 % and higher. So the colour is concentration-dependent similar as in the hemiamyloid apical rings. But contrary to hemiamyloidity, the violet and olive are also seen when KOH-pretreated, and I believe also in Melzer.

Zotto
Perz Piotr, 11-02-2007 09:00
Re:Paraphyses IKI reaction in Scutellinia
Thanks a lot, Robert & Zotto!