MelampsoraV2, Main, Exploration, bibRecordById, pubmed:15986927

Autoactive alleles of the flax L6 rust resistance gene induce non-race-specific rust resistance associated with the hypersensitive response

Identifieur interne : 001188 ( Main/Exploration ); précédent : 001187; suivant : 001189

Autoactive alleles of the flax L6 rust resistance gene induce non-race-specific rust resistance associated with the hypersensitive response

Auteurs : Paul Howles [Australie] ; Greg Lawrence [Australie] ; Jean Finnegan [Australie] ; Helen Mcfadden [Australie] ; Michael Ayliffe [Australie] ; Peter Dodds [Australie] ; Jeff Ellis [Australie]

Source :

Molecular plant-microbe interactions [ 0894-0282 ] ; 2005.

RBID : Pascal:05-0271714

Descripteurs français

KwdFr :
- Allèles (MeSH), Données de séquences moléculaires (MeSH), Feuilles de plante (croissance et développement), Feuilles de plante (génétique), Feuilles de plante (microbiologie), Immunité innée (génétique), Lin (croissance et développement), Lin (génétique), Lin (microbiologie), Maladies des plantes (génétique), Maladies des plantes (microbiologie), Mutagenèse dirigée (MeSH), Mutation (MeSH), Phénotype (MeSH), Protéines végétales (génétique), Régions promotrices (génétique) (génétique), Séquence conservée (génétique), Séquence d'acides aminés (MeSH), Végétaux génétiquement modifiés (MeSH).
MESH :
- croissance et développement : Feuilles de plante, Lin.
- génétique : Feuilles de plante, Immunité innée, Lin, Maladies des plantes, Protéines végétales, Régions promotrices (génétique), Séquence conservée.
- microbiologie : Feuilles de plante, Lin, Maladies des plantes.
Pascal (Inist)
- Allèles, Données de séquences moléculaires, Linum usitatissimum, Melampsora lini, Arabidopsis, Allèle, Mutagenèse dirigée, Mutation, Phénotype, Résistance, Gène, Site fixation, Souche virulente, Séquence d'acides aminés, Virulence, Mutation, Protéine, Région variable, Dose génique, Expression génique, Ethanol, Association genetique, Avirulence, Végétaux génétiquement modifiés.

English descriptors

KwdEn :
- Allele, Alleles (MeSH), Amino Acid Sequence (MeSH), Arabidopsis, Binding site, Conserved Sequence (genetics), Ethanol, Flax (genetics), Flax (growth & development), Flax (microbiology), Gene, Gene dosage, Gene expression, Immunity, Innate (genetics), Linum usitatissimum, Melampsora lini, Molecular Sequence Data (MeSH), Mutagenesis, Site-Directed (MeSH), Mutation, Mutation (MeSH), Phenotype (MeSH), Plant Diseases (genetics), Plant Diseases (microbiology), Plant Leaves (genetics), Plant Leaves (growth & development), Plant Leaves (microbiology), Plant Proteins (genetics), Plants, Genetically Modified (MeSH), Promoter Regions, Genetic (genetics), Protein, Resistance, Variable region, Virulence, Virulent strain, avirulence.
MESH :
- chemical , genetics : Plant Proteins.
- genetics : Conserved Sequence, Flax, Immunity, Innate, Plant Diseases, Plant Leaves, Promoter Regions, Genetic.
- growth & development : Flax, Plant Leaves.
- microbiology : Flax, Plant Diseases, Plant Leaves.
- Alleles, Amino Acid Sequence, Molecular Sequence Data, Mutagenesis, Site-Directed, Mutation, Phenotype, Plants, Genetically Modified.

Abstract

L6 is a nucleotide binding site-leucine rich repeat (NBS-LRR) gene that confers race-specific resistance in flax (Linum usitatissimum) to strains of flax rust (Melampsora lini) that carry avirulence alleles of the AvrL567 gene but not to rust strains that carry only the virulence allele. Several mutant and recombinant forms of L6 were made that altered either the methionine-histidine-aspartate (MHD) motif conserved in the NBS domain of resistance proteins or exchanged the short domain C-terminal to the LRR region that is highly variable among L allele products. In transgenic flax some of these alleles are autoactive; they cause a gene dosage-dependent dwarf phenotype and constitutive expression of genes that are markers for the plant defense response. Their effects and penetrance ranged from extreme to mild in their degree of plant stunting, survival, and reproduction. Dwarf plants were also resistant to flax rust strains virulent to wild-type L6 plants, and this nonspecific resistance was associated with a hypersensitive response (HR) at the site of rust infection. The strongest autoactive allele, expressed in Arabidopsis from an ethanol-inducible promoter, gave rise to plant death dependent on the enhanced disease susceptibility 1 (EDS1) gene, which indicates that the mutant flax (Linaceae) L6 gene can signal cell death through a defined disease-resistance pathway in a different plant family (Brassicaceae).

Affiliations:

Australie

Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Allele</term>
<term>Alleles (MeSH)</term>
<term>Amino Acid Sequence (MeSH)</term>
<term>Arabidopsis</term>
<term>Binding site</term>
<term>Conserved Sequence (genetics)</term>
<term>Ethanol</term>
<term>Flax (genetics)</term>
<term>Flax (growth & development)</term>
<term>Flax (microbiology)</term>
<term>Gene</term>
<term>Gene dosage</term>
<term>Gene expression</term>
<term>Immunity, Innate (genetics)</term>
<term>Linum usitatissimum</term>
<term>Melampsora lini</term>
<term>Molecular Sequence Data (MeSH)</term>
<term>Mutagenesis, Site-Directed (MeSH)</term>
<term>Mutation</term>
<term>Mutation (MeSH)</term>
<term>Phenotype (MeSH)</term>
<term>Plant Diseases (genetics)</term>
<term>Plant Diseases (microbiology)</term>
<term>Plant Leaves (genetics)</term>
<term>Plant Leaves (growth & development)</term>
<term>Plant Leaves (microbiology)</term>
<term>Plant Proteins (genetics)</term>
<term>Plants, Genetically Modified (MeSH)</term>
<term>Promoter Regions, Genetic (genetics)</term>
<term>Protein</term>
<term>Resistance</term>
<term>Variable region</term>
<term>Virulence</term>
<term>Virulent strain</term>
<term>avirulence</term>
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<keywords scheme="KwdFr" xml:lang="fr"><term>Allèles (MeSH)</term>
<term>Données de séquences moléculaires (MeSH)</term>
<term>Feuilles de plante (croissance et développement)</term>
<term>Feuilles de plante (génétique)</term>
<term>Feuilles de plante (microbiologie)</term>
<term>Immunité innée (génétique)</term>
<term>Lin (croissance et développement)</term>
<term>Lin (génétique)</term>
<term>Lin (microbiologie)</term>
<term>Maladies des plantes (génétique)</term>
<term>Maladies des plantes (microbiologie)</term>
<term>Mutagenèse dirigée (MeSH)</term>
<term>Mutation (MeSH)</term>
<term>Phénotype (MeSH)</term>
<term>Protéines végétales (génétique)</term>
<term>Régions promotrices (génétique) (génétique)</term>
<term>Séquence conservée (génétique)</term>
<term>Séquence d'acides aminés (MeSH)</term>
<term>Végétaux génétiquement modifiés (MeSH)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en"><term>Plant Proteins</term>
</keywords>
<keywords scheme="MESH" qualifier="croissance et développement" xml:lang="fr"><term>Feuilles de plante</term>
<term>Lin</term>
</keywords>
<keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Conserved Sequence</term>
<term>Flax</term>
<term>Immunity, Innate</term>
<term>Plant Diseases</term>
<term>Plant Leaves</term>
<term>Promoter Regions, Genetic</term>
</keywords>
<keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Flax</term>
<term>Plant Leaves</term>
</keywords>
<keywords scheme="MESH" qualifier="génétique" xml:lang="fr"><term>Feuilles de plante</term>
<term>Immunité innée</term>
<term>Lin</term>
<term>Maladies des plantes</term>
<term>Protéines végétales</term>
<term>Régions promotrices (génétique)</term>
<term>Séquence conservée</term>
</keywords>
<keywords scheme="MESH" qualifier="microbiologie" xml:lang="fr"><term>Feuilles de plante</term>
<term>Lin</term>
<term>Maladies des plantes</term>
</keywords>
<keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Flax</term>
<term>Plant Diseases</term>
<term>Plant Leaves</term>
</keywords>
<keywords scheme="MESH" xml:lang="en"><term>Alleles</term>
<term>Amino Acid Sequence</term>
<term>Molecular Sequence Data</term>
<term>Mutagenesis, Site-Directed</term>
<term>Mutation</term>
<term>Phenotype</term>
<term>Plants, Genetically Modified</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Allèles</term>
<term>Données de séquences moléculaires</term>
<term>Linum usitatissimum</term>
<term>Melampsora lini</term>
<term>Arabidopsis</term>
<term>Allèle</term>
<term>Mutagenèse dirigée</term>
<term>Mutation</term>
<term>Phénotype</term>
<term>Résistance</term>
<term>Gène</term>
<term>Site fixation</term>
<term>Souche virulente</term>
<term>Séquence d'acides aminés</term>
<term>Virulence</term>
<term>Mutation</term>
<term>Protéine</term>
<term>Région variable</term>
<term>Dose génique</term>
<term>Expression génique</term>
<term>Ethanol</term>
<term>Association genetique</term>
<term>Avirulence</term>
<term>Végétaux génétiquement modifiés</term>
</keywords>
</textClass>
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<front><div type="abstract" xml:lang="en">L6 is a nucleotide binding site-leucine rich repeat (NBS-LRR) gene that confers race-specific resistance in flax (Linum usitatissimum) to strains of flax rust (Melampsora lini) that carry avirulence alleles of the AvrL567 gene but not to rust strains that carry only the virulence allele. Several mutant and recombinant forms of L6 were made that altered either the methionine-histidine-aspartate (MHD) motif conserved in the NBS domain of resistance proteins or exchanged the short domain C-terminal to the LRR region that is highly variable among L allele products. In transgenic flax some of these alleles are autoactive; they cause a gene dosage-dependent dwarf phenotype and constitutive expression of genes that are markers for the plant defense response. Their effects and penetrance ranged from extreme to mild in their degree of plant stunting, survival, and reproduction. Dwarf plants were also resistant to flax rust strains virulent to wild-type L6 plants, and this nonspecific resistance was associated with a hypersensitive response (HR) at the site of rust infection. The strongest autoactive allele, expressed in Arabidopsis from an ethanol-inducible promoter, gave rise to plant death dependent on the enhanced disease susceptibility 1 (EDS1) gene, which indicates that the mutant flax (Linaceae) L6 gene can signal cell death through a defined disease-resistance pathway in a different plant family (Brassicaceae).</div>
</front>
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<affiliations><list><country><li>Australie</li>
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<name sortKey="Dodds, Peter" sort="Dodds, Peter" uniqKey="Dodds P" first="Peter" last="Dodds">Peter Dodds</name>
<name sortKey="Ellis, Jeff" sort="Ellis, Jeff" uniqKey="Ellis J" first="Jeff" last="Ellis">Jeff Ellis</name>
<name sortKey="Finnegan, Jean" sort="Finnegan, Jean" uniqKey="Finnegan J" first="Jean" last="Finnegan">Jean Finnegan</name>
<name sortKey="Lawrence, Greg" sort="Lawrence, Greg" uniqKey="Lawrence G" first="Greg" last="Lawrence">Greg Lawrence</name>
<name sortKey="Mcfadden, Helen" sort="Mcfadden, Helen" uniqKey="Mcfadden H" first="Helen" last="Mcfadden">Helen Mcfadden</name>
</country>
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   |texte=   Autoactive alleles of the flax L6 rust resistance gene induce non-race-specific rust resistance associated with the hypersensitive response
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Autoactive alleles of the flax L6 rust resistance gene induce non-race-specific rust resistance associated with the hypersensitive response

Autoactive alleles of the flax L6 rust resistance gene induce non-race-specific rust resistance associated with the hypersensitive response

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	Serveur d'exploration Melampsora (ISTEX)
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