Expression of early nodulin genes in alfalfa mycorrhizae indicates that signal transduction pathways used in forming arbuscular mycorrhizae and Rhizobium-induced nodules may be conserved

Transcripts for two genes expressed early in alfalfa nodule development (MsENOD40 and MsENOD2 are found in mycorrhizal roots, but not in noncolonized roots or in roots infected with the fungal pathogen Rhizoctonia solani. These same two early nodulin genes are expressed in uninoculated roots upon ap...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences - PNAS 1997-05, Vol.94 (10), p.5467-5472
Main Authors: Van Rhun, P. (University of California, Los Angeles, CA.), Fang, Y, Galili, S, Shaul, O, Atzmon, N, Wininger, S, Eshed, Y, Lum, M, Li, Y, To, V
Format: Article
Language:English
Subjects:
6-BENZILADENINA
6-BENZYLADENINE
Alfalfa
ARN MENSAJERO
ARN MESSAGER
Biological Sciences
Biology
Cytokinins
DNA
ENFERMEDADES FUNGOSAS
EXPRESION GENICA
EXPRESSION DES GENES
Fungi
GENE
GENES
GLOMUS INTRARADICES
Grain
MALADIE FONGIQUE
MEDICAGO SATIVA
MICORRIZAS ARBUSCULARES VESICULARES
MYCORHIZE A VESICULE ET ARBUSCULE
Mycorrhizae
Nodules
Plant roots
Plants
PROTEINAS
PROTEINE
RACINE
RAICES
RHIZOCTONIA SOLANI
RNA
SUBSTANCE DE CROISSANCE VEGETALE
SUSTANCIAS DE CRECIMIENTO VEGETAL
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Summary:Transcripts for two genes expressed early in alfalfa nodule development (MsENOD40 and MsENOD2 are found in mycorrhizal roots, but not in noncolonized roots or in roots infected with the fungal pathogen Rhizoctonia solani. These same two early nodulin genes are expressed in uninoculated roots upon application of the cytokinin 6-benzylaminopurine. Correlated with the expression of the two early nodulin genes, we found that mycorrhizal roots contain higher levels of trans-zeatin riboside than nonmycorrhizal roots. These data suggest that there may be conservation of signal transduction pathways between the two symbioses-nitrogen-fixing nodules and phosphate-acquiring mycorrhizae
ISSN:0027-8424
1091-6490
DOI:10.1073/pnas.94.10.5467