4 mars 2014

Mycorhize: facteur Myc et facteur Nod

Les signaux de commmunication



























Les facteurs NOD.pour l'échange avec les bactéries
Les facteurs MYC
pour l'échange avec les myclia



http://www.dijon.inra.fr/Toutes-les-actualites/champignon-symbiotique
http://presse.inra.fr/Ressources/Communiques-de-presse/Le-plus-celebre-champignon-symbiotique-livre-ses-secrets

Réseau de communication dans la mycosphère:
Fungus network 'plays role in plant communication' http://www.bbc.com/news/science-environment-22462855

liste des souches ectomycorhize EcM: Alpova diplophloeus, Amanita rubescens, Amphinema byssoides, Boletus edulis, Cadophora finlandia, Cenococcum geophilum, Dark septate endophyte, Hebeloma calyptosporum, Hebeloma circinans, Hebeloma coloriatum, Hebeloma crustuliniforme, Hebeloma crustuliniforme, Hebeloma cylindrosporum, Hebeloma edurum, Hebeloma longicaudum, Hebeloma mesophaeum, Hebeloma saccariolens, Hebeloma sinapizans, Hebeloma truncatum, Hebeloma vaccinum, Hymenoscyphus sp., Laccaria bicolor, Laccaria chiensis, Laccaria laccata, Laccaria proxima, Laccaria tortilis, Lactaria deliciousus, Lactarius aurantiosordidus, Paxillus involutus, Paxillus involutus, Phialocephala fortinii, Phialophora finlandia, Pisolithus tinctorius, Rhizopogon vinicolor, Sphaerobolus stellatus, Suillus albidipes, Suillus brevipes, Suillus gervillei, Suillus granulatus, Suillus granulatus, Suillus luteus, Suillus tommentosus, Thelephore terrestris, Tricholoma equestre, Tricholoma magnivelare, Tricholoma matsutake, Tricholoma portentosum, Tricholoma scalpturatum...
source: Fortin

des phytohormones chez les champignons?
extrait revue mycologia mars/avril 2015

Detection of phytohormones in temperate forest fungi predicts consistent abscisic acid production and a common pathway for cytokinin biosynthesis
Erin N. Morrison1
Environmental and Life Sciences Graduate Program, Trent University, Peterborough, Ontario, K9J 7B8 Canada
Sarah Knowles and Allison Hayward
Biology Department, Trent University, Peterborough, Ontario, K9J 7B8 Canada
R. Greg Thorn
Department of Biology, Western University, London, Ontario, N6A 5B7 Canada
Barry J. Saville
Forensic Science Program, Trent University, Peterborough, Ontario, K9J 7B8 Canada
R.J.N. Emery
  1. Biology Department, Trent University, Peterborough, Ontario, K9J 7B8 Canada

Abstract

The phytohormones, abscisic acid and cytokinin, once were thought to be present uniquely in plants, but increasing evidence suggests that these hormones are present in a wide variety of organisms. Few studies have examined fungi for the presence of these “plant” hormones or addressed whether their levels differ based on the nutrition mode of the fungus. This study examined 20 temperate forest fungi of differing nutritional modes (ectomycorrhizal, wood-rotting, saprotrophic). Abscisic acid and cytokinin were present in all fungi sampled; this indicated that the sampled fungi have the capacity to synthesize these two classes of phytohormones. Of the 27 cytokinins analyzed by HPLC-ESI MS/MS, seven were present in all fungi sampled. This suggested the existence of a common cytokinin metabolic pathway in fungi that does not vary among different nutritional modes. Predictions regarding the source of isopentenyl, cis-zeatin and methylthiol CK production stemming from the tRNA degradation pathway among fungi are discussed.




http://journal.frontiersin.org/Journal/10.3389/fpls.2013.00120/full
http://www.nature.com/nature/journal/v427/n6973/fig_tab/427401a_F2.html
http://www.mycologia.org/content/107/2/245.abstract
http://theses.ulaval.ca/archimede/fichiers/22964/ch01.html