MycorrhizaeV1, Main, Exploration, bibRecord, 001C96

Host responses in Norway spruce roots induced to the pathogen Ceratocystis polonica are evaded or suppressed by the ectomycorrhizal fungus Laccaria bicolor.

Identifieur interne : 001C96 ( Main/Exploration ); précédent : 001C95; suivant : 001C97

Host responses in Norway spruce roots induced to the pathogen Ceratocystis polonica are evaded or suppressed by the ectomycorrhizal fungus Laccaria bicolor.

Auteurs : N E Nagy [Norvège] ; C G Fossdal

Source :

Plant biology (Stuttgart, Germany) [ 1438-8677 ] ; 2013.

RBID : pubmed:22640005

Descripteurs français

English descriptors

KwdEn :
- Ascomycota (physiology), Cell Death (MeSH), Cell Wall (metabolism), Host-Pathogen Interactions (MeSH), Isoenzymes (MeSH), Laccaria (physiology), Lignin (metabolism), Mycorrhizae (physiology), Peptide Hydrolases (metabolism), Peroxidase (metabolism), Picea (cytology), Picea (immunology), Picea (microbiology), Picea (physiology), Plant Diseases (immunology), Plant Diseases (microbiology), Plant Leaves (cytology), Plant Leaves (immunology), Plant Leaves (microbiology), Plant Leaves (physiology), Plant Proteins (metabolism), Plant Roots (cytology), Plant Roots (immunology), Plant Roots (microbiology), Plant Roots (physiology), Plant Shoots (cytology), Plant Shoots (immunology), Plant Shoots (microbiology), Plant Shoots (physiology), Seedlings (cytology), Seedlings (immunology), Seedlings (microbiology), Seedlings (physiology), Stress, Physiological (physiology), Symbiosis (MeSH).
MESH :
- chemical , metabolism : Lignin, Peptide Hydrolases, Peroxidase, Plant Proteins.
- chemical : Isoenzymes.
- cytology : Picea, Plant Leaves, Plant Roots, Plant Shoots, Seedlings.
- immunology : Picea, Plant Diseases, Plant Leaves, Plant Roots, Plant Shoots, Seedlings.
- metabolism : Cell Wall.
- microbiology : Picea, Plant Diseases, Plant Leaves, Plant Roots, Plant Shoots, Seedlings.
- physiology : Ascomycota, Laccaria, Mycorrhizae, Picea, Plant Leaves, Plant Roots, Plant Shoots, Seedlings, Stress, Physiological.
- Cell Death, Host-Pathogen Interactions, Symbiosis.

Abstract

The outcome of a compatible mycorrhizal interaction is different from that in a compatible plant-pathogen interaction; however, it is not clear what mechanisms are used to evade or suppress the host defence. The aim of this work is to reveal differences between the interaction of Norway spruce roots to the pathogen Ceratocystis polonica and the ectomycorrhizal Laccaria bicolor, examine if L. bicolor is able to evade inducing host defence responses typically induced by pathogens, and test if prior inoculation with the ectomycorrhizal fungus affects the outcome of a later challenge with the pathogen. The pathogen was able to invade the roots and caused extensive necrosis, leading to seedling death, with or without prior inoculation with L. bicolor. The ectomycorrhizal L. bicolor colonised primary roots of the Norway spruce seedlings by partly covering, displacing and convoluting the cells of the outer root cortex, leaving the seedlings healthy. We detected increased total peroxidase activity, and staining indicating increased lignification in roots as a response to C. polonica. In L. bicolor inoculated roots there was no increase in total peroxidase activity, but an additional highly acidic peroxidase isoform appeared that was not present in healthy roots, or in roots invaded by the pathogen. Increased protease activity was detected in roots colonised by C. polonica, but little protease activity was detected in L. bicolor inoculated roots. These results suggest that the pathogen efficiently invades the roots despite the induced host defence responses, while L. bicolor suppresses or evades inducing such host responses in this experimental system.

DOI: 10.1111/j.1438-8677.2012.00596.x
PubMed: 22640005

Affiliations:

Norvège

Links toward previous steps (curation, corpus...)

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Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Ascomycota (physiology)</term>
<term>Cell Death (MeSH)</term>
<term>Cell Wall (metabolism)</term>
<term>Host-Pathogen Interactions (MeSH)</term>
<term>Isoenzymes (MeSH)</term>
<term>Laccaria (physiology)</term>
<term>Lignin (metabolism)</term>
<term>Mycorrhizae (physiology)</term>
<term>Peptide Hydrolases (metabolism)</term>
<term>Peroxidase (metabolism)</term>
<term>Picea (cytology)</term>
<term>Picea (immunology)</term>
<term>Picea (microbiology)</term>
<term>Picea (physiology)</term>
<term>Plant Diseases (immunology)</term>
<term>Plant Diseases (microbiology)</term>
<term>Plant Leaves (cytology)</term>
<term>Plant Leaves (immunology)</term>
<term>Plant Leaves (microbiology)</term>
<term>Plant Leaves (physiology)</term>
<term>Plant Proteins (metabolism)</term>
<term>Plant Roots (cytology)</term>
<term>Plant Roots (immunology)</term>
<term>Plant Roots (microbiology)</term>
<term>Plant Roots (physiology)</term>
<term>Plant Shoots (cytology)</term>
<term>Plant Shoots (immunology)</term>
<term>Plant Shoots (microbiology)</term>
<term>Plant Shoots (physiology)</term>
<term>Seedlings (cytology)</term>
<term>Seedlings (immunology)</term>
<term>Seedlings (microbiology)</term>
<term>Seedlings (physiology)</term>
<term>Stress, Physiological (physiology)</term>
<term>Symbiosis (MeSH)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Ascomycota (physiologie)</term>
<term>Feuilles de plante (cytologie)</term>
<term>Feuilles de plante (immunologie)</term>
<term>Feuilles de plante (microbiologie)</term>
<term>Feuilles de plante (physiologie)</term>
<term>Interactions hôte-pathogène (MeSH)</term>
<term>Isoenzymes (MeSH)</term>
<term>Laccaria (physiologie)</term>
<term>Lignine (métabolisme)</term>
<term>Maladies des plantes (immunologie)</term>
<term>Maladies des plantes (microbiologie)</term>
<term>Mort cellulaire (MeSH)</term>
<term>Mycorhizes (physiologie)</term>
<term>Myeloperoxidase (métabolisme)</term>
<term>Paroi cellulaire (métabolisme)</term>
<term>Peptide hydrolases (métabolisme)</term>
<term>Picea (cytologie)</term>
<term>Picea (immunologie)</term>
<term>Picea (microbiologie)</term>
<term>Picea (physiologie)</term>
<term>Plant (cytologie)</term>
<term>Plant (immunologie)</term>
<term>Plant (microbiologie)</term>
<term>Plant (physiologie)</term>
<term>Pousses de plante (cytologie)</term>
<term>Pousses de plante (immunologie)</term>
<term>Pousses de plante (microbiologie)</term>
<term>Pousses de plante (physiologie)</term>
<term>Protéines végétales (métabolisme)</term>
<term>Racines de plante (cytologie)</term>
<term>Racines de plante (immunologie)</term>
<term>Racines de plante (microbiologie)</term>
<term>Racines de plante (physiologie)</term>
<term>Stress physiologique (physiologie)</term>
<term>Symbiose (MeSH)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Lignin</term>
<term>Peptide Hydrolases</term>
<term>Peroxidase</term>
<term>Plant Proteins</term>
</keywords>
<keywords scheme="MESH" type="chemical" xml:lang="en"><term>Isoenzymes</term>
</keywords>
<keywords scheme="MESH" qualifier="cytologie" xml:lang="fr"><term>Feuilles de plante</term>
<term>Picea</term>
<term>Plant</term>
<term>Pousses de plante</term>
<term>Racines de plante</term>
</keywords>
<keywords scheme="MESH" qualifier="cytology" xml:lang="en"><term>Picea</term>
<term>Plant Leaves</term>
<term>Plant Roots</term>
<term>Plant Shoots</term>
<term>Seedlings</term>
</keywords>
<keywords scheme="MESH" qualifier="immunologie" xml:lang="fr"><term>Feuilles de plante</term>
<term>Maladies des plantes</term>
<term>Picea</term>
<term>Plant</term>
<term>Pousses de plante</term>
<term>Racines de plante</term>
</keywords>
<keywords scheme="MESH" qualifier="immunology" xml:lang="en"><term>Picea</term>
<term>Plant Diseases</term>
<term>Plant Leaves</term>
<term>Plant Roots</term>
<term>Plant Shoots</term>
<term>Seedlings</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Cell Wall</term>
</keywords>
<keywords scheme="MESH" qualifier="microbiologie" xml:lang="fr"><term>Feuilles de plante</term>
<term>Maladies des plantes</term>
<term>Picea</term>
<term>Plant</term>
<term>Pousses de plante</term>
<term>Racines de plante</term>
</keywords>
<keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Picea</term>
<term>Plant Diseases</term>
<term>Plant Leaves</term>
<term>Plant Roots</term>
<term>Plant Shoots</term>
<term>Seedlings</term>
</keywords>
<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Lignine</term>
<term>Myeloperoxidase</term>
<term>Paroi cellulaire</term>
<term>Peptide hydrolases</term>
<term>Protéines végétales</term>
</keywords>
<keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Ascomycota</term>
<term>Feuilles de plante</term>
<term>Laccaria</term>
<term>Mycorhizes</term>
<term>Picea</term>
<term>Plant</term>
<term>Pousses de plante</term>
<term>Racines de plante</term>
<term>Stress physiologique</term>
</keywords>
<keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Ascomycota</term>
<term>Laccaria</term>
<term>Mycorrhizae</term>
<term>Picea</term>
<term>Plant Leaves</term>
<term>Plant Roots</term>
<term>Plant Shoots</term>
<term>Seedlings</term>
<term>Stress, Physiological</term>
</keywords>
<keywords scheme="MESH" xml:lang="en"><term>Cell Death</term>
<term>Host-Pathogen Interactions</term>
<term>Symbiosis</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr"><term>Interactions hôte-pathogène</term>
<term>Isoenzymes</term>
<term>Mort cellulaire</term>
<term>Symbiose</term>
</keywords>
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<front><div type="abstract" xml:lang="en">The outcome of a compatible mycorrhizal interaction is different from that in a compatible plant-pathogen interaction; however, it is not clear what mechanisms are used to evade or suppress the host defence. The aim of this work is to reveal differences between the interaction of Norway spruce roots to the pathogen Ceratocystis polonica and the ectomycorrhizal Laccaria bicolor, examine if L. bicolor is able to evade inducing host defence responses typically induced by pathogens, and test if prior inoculation with the ectomycorrhizal fungus affects the outcome of a later challenge with the pathogen. The pathogen was able to invade the roots and caused extensive necrosis, leading to seedling death, with or without prior inoculation with L. bicolor. The ectomycorrhizal L. bicolor colonised primary roots of the Norway spruce seedlings by partly covering, displacing and convoluting the cells of the outer root cortex, leaving the seedlings healthy. We detected increased total peroxidase activity, and staining indicating increased lignification in roots as a response to C. polonica. In L. bicolor inoculated roots there was no increase in total peroxidase activity, but an additional highly acidic peroxidase isoform appeared that was not present in healthy roots, or in roots invaded by the pathogen. Increased protease activity was detected in roots colonised by C. polonica, but little protease activity was detected in L. bicolor inoculated roots. These results suggest that the pathogen efficiently invades the roots despite the induced host defence responses, while L. bicolor suppresses or evades inducing such host responses in this experimental system.</div>
</front>
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<Abstract><AbstractText>The outcome of a compatible mycorrhizal interaction is different from that in a compatible plant-pathogen interaction; however, it is not clear what mechanisms are used to evade or suppress the host defence. The aim of this work is to reveal differences between the interaction of Norway spruce roots to the pathogen Ceratocystis polonica and the ectomycorrhizal Laccaria bicolor, examine if L. bicolor is able to evade inducing host defence responses typically induced by pathogens, and test if prior inoculation with the ectomycorrhizal fungus affects the outcome of a later challenge with the pathogen. The pathogen was able to invade the roots and caused extensive necrosis, leading to seedling death, with or without prior inoculation with L. bicolor. The ectomycorrhizal L. bicolor colonised primary roots of the Norway spruce seedlings by partly covering, displacing and convoluting the cells of the outer root cortex, leaving the seedlings healthy. We detected increased total peroxidase activity, and staining indicating increased lignification in roots as a response to C. polonica. In L. bicolor inoculated roots there was no increase in total peroxidase activity, but an additional highly acidic peroxidase isoform appeared that was not present in healthy roots, or in roots invaded by the pathogen. Increased protease activity was detected in roots colonised by C. polonica, but little protease activity was detected in L. bicolor inoculated roots. These results suggest that the pathogen efficiently invades the roots despite the induced host defence responses, while L. bicolor suppresses or evades inducing such host responses in this experimental system.</AbstractText>
<CopyrightInformation>© 2012 German Botanical Society and The Royal Botanical Society of the Netherlands.</CopyrightInformation>
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<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Nagy</LastName>
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<MeshHeadingList><MeshHeading><DescriptorName UI="D001203" MajorTopicYN="N">Ascomycota</DescriptorName>
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<MeshHeading><DescriptorName UI="D016923" MajorTopicYN="N">Cell Death</DescriptorName>
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<QualifierName UI="Q000276" MajorTopicYN="Y">immunology</QualifierName>
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<QualifierName UI="Q000276" MajorTopicYN="N">immunology</QualifierName>
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<MeshHeading><DescriptorName UI="D018520" MajorTopicYN="N">Plant Shoots</DescriptorName>
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<QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName>
<QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName>
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<MeshHeading><DescriptorName UI="D013559" MajorTopicYN="N">Symbiosis</DescriptorName>
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   |type=    RBID
   |clé=     pubmed:22640005
   |texte=   Host responses in Norway spruce roots induced to the pathogen Ceratocystis polonica are evaded or suppressed by the ectomycorrhizal fungus Laccaria bicolor.
}}

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       | HfdSelect -Kh $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd   \
       | NlmPubMed2Wicri -a MycorrhizaeV1

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Host responses in Norway spruce roots induced to the pathogen Ceratocystis polonica are evaded or suppressed by the ectomycorrhizal fungus Laccaria bicolor.

Host responses in Norway spruce roots induced to the pathogen Ceratocystis polonica are evaded or suppressed by the ectomycorrhizal fungus Laccaria bicolor.

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