Fungal elicitation of signal transduction-related plant genes precedes mycorrhiza establishment and requires the dmi3 gene in Medicago truncatula.
Identifieur interne : 003646 ( Main/Corpus ); précédent : 003645; suivant : 003647Fungal elicitation of signal transduction-related plant genes precedes mycorrhiza establishment and requires the dmi3 gene in Medicago truncatula.
Auteurs : Stephanie Weidmann ; Lisa Sanchez ; Julie Descombin ; Odile Chatagnier ; Silvio Gianinazzi ; Vivienne Gianinazzi-PearsonSource :
- Molecular plant-microbe interactions : MPMI [ 0894-0282 ] ; 2004.
English descriptors
- KwdEn :
- MESH :
- metabolism : Plant Roots.
- microbiology : Medicago truncatula.
- physiology : Medicago truncatula, Mycorrhizae, Nitrogen Fixation.
- Gene Expression Regulation, Plant, Mutation, Signal Transduction, Symbiosis.
Abstract
Suppressive subtractive hybridization and expressed sequence tag sequencing identified 29 plant genes which are upregulated during the appressorium stage of mycorrhiza establishment between Medicago truncatula J5 (Myc+) and Glomus mosseae. Eleven genes coding plant proteins with predicted functions in signal transduction, transcription, and translation were investigated in more detail for their relation to early events of symbiotic interactions. Expression profiling showed that the genes are activated not only from the appressorium stage up to the fully established symbiosis in the Myc+ genotype of M. truncatula, but also when the symbionts are not in direct cell contact, suggesting that diffusible fungal molecules (Myc factors) play a, role in the induction of a signal-transduction pathway. Transcript accumulation in roots of a mycorrhiza-defective Myc- dmi3 mutant of M. truncatula is not modified by appressorium formation or diffusible fungal molecules, indicating that the signal transduction pathway is required for a successful G. mosseae-M. truncatula interaction leading to symbiosis development. The symbiotic nodulating bacterium Sinorhizobium meliloti does not activate the 11 genes, which supposes early discrimination by plant roots between the microbial symbionts.
DOI: 10.1094/MPMI.2004.17.12.1385
PubMed: 15597744
Links to Exploration step
pubmed:15597744Le document en format XML
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<affiliation><nlm:affiliation>UMR INRA 1088/CNRS 5184/U Bourgogne Plante-Microbe-Environnement, INRA-CMSE, BP 86510, 21065 Dijon cedex, France.</nlm:affiliation>
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<author><name sortKey="Sanchez, Lisa" sort="Sanchez, Lisa" uniqKey="Sanchez L" first="Lisa" last="Sanchez">Lisa Sanchez</name>
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<author><name sortKey="Descombin, Julie" sort="Descombin, Julie" uniqKey="Descombin J" first="Julie" last="Descombin">Julie Descombin</name>
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<author><name sortKey="Chatagnier, Odile" sort="Chatagnier, Odile" uniqKey="Chatagnier O" first="Odile" last="Chatagnier">Odile Chatagnier</name>
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<author><name sortKey="Gianinazzi, Silvio" sort="Gianinazzi, Silvio" uniqKey="Gianinazzi S" first="Silvio" last="Gianinazzi">Silvio Gianinazzi</name>
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<author><name sortKey="Gianinazzi Pearson, Vivienne" sort="Gianinazzi Pearson, Vivienne" uniqKey="Gianinazzi Pearson V" first="Vivienne" last="Gianinazzi-Pearson">Vivienne Gianinazzi-Pearson</name>
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<term>Medicago truncatula (microbiology)</term>
<term>Medicago truncatula (physiology)</term>
<term>Mutation (MeSH)</term>
<term>Mycorrhizae (physiology)</term>
<term>Nitrogen Fixation (physiology)</term>
<term>Plant Roots (metabolism)</term>
<term>Signal Transduction (MeSH)</term>
<term>Symbiosis (MeSH)</term>
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<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Plant Roots</term>
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<keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Medicago truncatula</term>
<term>Mycorrhizae</term>
<term>Nitrogen Fixation</term>
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<front><div type="abstract" xml:lang="en">Suppressive subtractive hybridization and expressed sequence tag sequencing identified 29 plant genes which are upregulated during the appressorium stage of mycorrhiza establishment between Medicago truncatula J5 (Myc+) and Glomus mosseae. Eleven genes coding plant proteins with predicted functions in signal transduction, transcription, and translation were investigated in more detail for their relation to early events of symbiotic interactions. Expression profiling showed that the genes are activated not only from the appressorium stage up to the fully established symbiosis in the Myc+ genotype of M. truncatula, but also when the symbionts are not in direct cell contact, suggesting that diffusible fungal molecules (Myc factors) play a, role in the induction of a signal-transduction pathway. Transcript accumulation in roots of a mycorrhiza-defective Myc- dmi3 mutant of M. truncatula is not modified by appressorium formation or diffusible fungal molecules, indicating that the signal transduction pathway is required for a successful G. mosseae-M. truncatula interaction leading to symbiosis development. The symbiotic nodulating bacterium Sinorhizobium meliloti does not activate the 11 genes, which supposes early discrimination by plant roots between the microbial symbionts.</div>
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<Abstract><AbstractText>Suppressive subtractive hybridization and expressed sequence tag sequencing identified 29 plant genes which are upregulated during the appressorium stage of mycorrhiza establishment between Medicago truncatula J5 (Myc+) and Glomus mosseae. Eleven genes coding plant proteins with predicted functions in signal transduction, transcription, and translation were investigated in more detail for their relation to early events of symbiotic interactions. Expression profiling showed that the genes are activated not only from the appressorium stage up to the fully established symbiosis in the Myc+ genotype of M. truncatula, but also when the symbionts are not in direct cell contact, suggesting that diffusible fungal molecules (Myc factors) play a, role in the induction of a signal-transduction pathway. Transcript accumulation in roots of a mycorrhiza-defective Myc- dmi3 mutant of M. truncatula is not modified by appressorium formation or diffusible fungal molecules, indicating that the signal transduction pathway is required for a successful G. mosseae-M. truncatula interaction leading to symbiosis development. The symbiotic nodulating bacterium Sinorhizobium meliloti does not activate the 11 genes, which supposes early discrimination by plant roots between the microbial symbionts.</AbstractText>
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