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cg12 expression is specifically linked to infection of root hairs and cortical cells during Casuarina glauca and Allocasuarina verticillata actinorhizal nodule development.

Identifieur interne : 003892 ( Main/Corpus ); précédent : 003891; suivant : 003893

cg12 expression is specifically linked to infection of root hairs and cortical cells during Casuarina glauca and Allocasuarina verticillata actinorhizal nodule development.

Auteurs : Sergio Svistoonoff ; Laurent Laplaze ; Florence Auguy ; John Runions ; Robin Duponnois ; Jim Haseloff ; Claudine Franche ; Didier Bogusz

Source :

RBID : pubmed:12848425

English descriptors

Abstract

cg12 is an early actinorhizal nodulin gene from Casuarina glauca encoding a subtilisin-like serine protease. Using transgenic Casuarinaceae plants carrying cg12-gus and cg12-gfp fusions, we have studied the expression pattern conferred by the cg12 promoter region after inoculation with Frankia. cg12 was found to be expressed in root hairs and in root and nodule cortical cells containing Frankia infection threads. cg12 expression was also monitored after inoculation with ineffective Frankia strains, during mycorrhizae formation, and after diverse hormonal treatments. None of these treatments was able to induce its expression, therefore suggesting that cg12 expression is linked to plant cell infection by Frankia strains. Possible roles of cg12 in actinorhizal symbiosis are discussed.

DOI: 10.1094/MPMI.2003.16.7.600
PubMed: 12848425

Links to Exploration step

pubmed:12848425

Le document en format XML

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<term>Gene Expression Regulation, Plant (MeSH)</term>
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<term>Magnoliopsida (cytology)</term>
<term>Magnoliopsida (genetics)</term>
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<term>Plant Proteins (MeSH)</term>
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<term>Plant Roots (genetics)</term>
<term>Plant Roots (microbiology)</term>
<term>Plants, Genetically Modified (MeSH)</term>
<term>Promoter Regions, Genetic (genetics)</term>
<term>Subtilisins (chemistry)</term>
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<div type="abstract" xml:lang="en">cg12 is an early actinorhizal nodulin gene from Casuarina glauca encoding a subtilisin-like serine protease. Using transgenic Casuarinaceae plants carrying cg12-gus and cg12-gfp fusions, we have studied the expression pattern conferred by the cg12 promoter region after inoculation with Frankia. cg12 was found to be expressed in root hairs and in root and nodule cortical cells containing Frankia infection threads. cg12 expression was also monitored after inoculation with ineffective Frankia strains, during mycorrhizae formation, and after diverse hormonal treatments. None of these treatments was able to induce its expression, therefore suggesting that cg12 expression is linked to plant cell infection by Frankia strains. Possible roles of cg12 in actinorhizal symbiosis are discussed.</div>
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