Your browser doesn't support javascript.
loading
The indolic compound hypaphorine produced by ectomycorrhizal fungus interferes with auxin action and evokes early responses in nonhost Arabidopsis thaliana.
Reboutier, David; Bianchi, Michele; Brault, Mathias; Roux, Camille; Dauphin, Aurélien; Rona, Jean-Pierre; Legué, Valérie; Lapeyrie, Frédéric; Bouteau, François.
Afiliação
  • Reboutier D; Laboratoire d'Electrophysiologie des Membranes EA 3514, Université Denis Diderot-Paris 7, France.
Mol Plant Microbe Interact ; 15(9): 932-8, 2002 Sep.
Article em En | MEDLINE | ID: mdl-12236599
Signals leading to mycorrhizal differentiation are largely unknown. We have studied the sensitivity of the root system from plant model Arabidopsis thaliana to hypaphorine, the major indolic compound isolated from the basidiomycetous fungus Pisolithus tinctorius. This fungi establishes ectomycorrhizas with Eucalyptus globulus. Hypaphorine controls root hair elongation and counteracts the activity of indole-3-acetic acid on root elongation on A. thaliana, as previously reported for the host plant. In addition, we show that hypaphorine counteracts the rapid upregulation by indole-3-acetic acid and 1-naphthalenic-acetic acid of the primary auxin-responsive gene IAA1 and induces a rapid, transient membrane depolarization in root hairs and suspension cells, due to the modulation of anion and K+ currents. These early responses indicate that components necessary for symbiosis-related differentiation events are present in the nonhost plant A. thaliana and provide tools for the dissection of the hypaphorine-auxin interaction.
Assuntos
Buscar no Google
Base de dados: MEDLINE Assunto principal: Proteínas de Plantas / Arabidopsis / Proteínas de Arabidopsis / Micorrizas / Ácidos Indolacéticos / Indóis Idioma: En Revista: Mol Plant Microbe Interact Assunto da revista: BIOLOGIA MOLECULAR / BOTANICA / MICROBIOLOGIA Ano de publicação: 2002 Tipo de documento: Article País de afiliação: França
Buscar no Google
Base de dados: MEDLINE Assunto principal: Proteínas de Plantas / Arabidopsis / Proteínas de Arabidopsis / Micorrizas / Ácidos Indolacéticos / Indóis Idioma: En Revista: Mol Plant Microbe Interact Assunto da revista: BIOLOGIA MOLECULAR / BOTANICA / MICROBIOLOGIA Ano de publicação: 2002 Tipo de documento: Article País de afiliação: França