The reduced mycorrhizal colonisation (rmc) mutation of tomato disrupts five gene sequences including the CYCLOPS/IPD3 homologue.
Identifieur interne : 001C54 ( Main/Corpus ); précédent : 001C53; suivant : 001C55The reduced mycorrhizal colonisation (rmc) mutation of tomato disrupts five gene sequences including the CYCLOPS/IPD3 homologue.
Auteurs : Nicholas J. Larkan ; Dan R. Ruzicka ; Tamara Edmonds-Tibbett ; Jonathan M H. Durkin ; Louise E. Jackson ; F Andrew Smith ; Daniel P. Schachtman ; Sally E. Smith ; Susan J. BarkerSource :
- Mycorrhiza [ 1432-1890 ] ; 2013.
English descriptors
- KwdEn :
- MESH :
- chemical , genetics : Plant Proteins.
- genetics : Fabaceae, Lycopersicon esculentum.
- microbiology : Fabaceae, Lycopersicon esculentum.
- physiology : Fungi, Mycorrhizae.
- Mutation, Symbiosis.
Abstract
Arbuscular mycorrhizal (AM) symbiosis in vascular plant roots is an ancient mutualistic interaction that evolved with land plants. More recently evolved root mutualisms have recruited components of the AM signalling pathway as identified with molecular approaches in model legume research. Earlier we reported that the reduced mycorrhizal colonisation (rmc) mutation of tomato mapped to chromosome 8. Here we report additional functional characterisation of the rmc mutation using genotype grafts and proteomic and transcriptomic analyses. Our results led to identification of the precise genome location of the Rmc locus from which we identified the mutation by sequencing. The rmc phenotype results from a deletion that disrupts five predicted gene sequences, one of which has close sequence match to the CYCLOPS/IPD3 gene identified in legumes as an essential intracellular regulator of both AM and rhizobial symbioses. Identification of two other genes not located at the rmc locus but with altered expression in the rmc genotype is also described. Possible roles of the other four disrupted genes in the deleted region are discussed. Our results support the identification of CYCLOPS/IPD3 in legumes and rice as a key gene required for AM symbiosis. The extensive characterisation of rmc in comparison with its 'parent' 76R, which has a normal mycorrhizal phenotype, has validated these lines as an important comparative model for glasshouse and field studies of AM and non-mycorrhizal plants with respect to plant competition and microbial interactions with vascular plant roots.
DOI: 10.1007/s00572-013-0498-7
PubMed: 23572326
Links to Exploration step
pubmed:23572326Le document en format XML
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<author><name sortKey="Edmonds Tibbett, Tamara" sort="Edmonds Tibbett, Tamara" uniqKey="Edmonds Tibbett T" first="Tamara" last="Edmonds-Tibbett">Tamara Edmonds-Tibbett</name>
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<series><title level="j">Mycorrhiza</title>
<idno type="eISSN">1432-1890</idno>
<imprint><date when="2013" type="published">2013</date>
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<term>Fabaceae (microbiology)</term>
<term>Fungi (physiology)</term>
<term>Lycopersicon esculentum (genetics)</term>
<term>Lycopersicon esculentum (microbiology)</term>
<term>Mutation (MeSH)</term>
<term>Mycorrhizae (physiology)</term>
<term>Plant Proteins (genetics)</term>
<term>Symbiosis (MeSH)</term>
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<term>Mycorrhizae</term>
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<front><div type="abstract" xml:lang="en">Arbuscular mycorrhizal (AM) symbiosis in vascular plant roots is an ancient mutualistic interaction that evolved with land plants. More recently evolved root mutualisms have recruited components of the AM signalling pathway as identified with molecular approaches in model legume research. Earlier we reported that the reduced mycorrhizal colonisation (rmc) mutation of tomato mapped to chromosome 8. Here we report additional functional characterisation of the rmc mutation using genotype grafts and proteomic and transcriptomic analyses. Our results led to identification of the precise genome location of the Rmc locus from which we identified the mutation by sequencing. The rmc phenotype results from a deletion that disrupts five predicted gene sequences, one of which has close sequence match to the CYCLOPS/IPD3 gene identified in legumes as an essential intracellular regulator of both AM and rhizobial symbioses. Identification of two other genes not located at the rmc locus but with altered expression in the rmc genotype is also described. Possible roles of the other four disrupted genes in the deleted region are discussed. Our results support the identification of CYCLOPS/IPD3 in legumes and rice as a key gene required for AM symbiosis. The extensive characterisation of rmc in comparison with its 'parent' 76R, which has a normal mycorrhizal phenotype, has validated these lines as an important comparative model for glasshouse and field studies of AM and non-mycorrhizal plants with respect to plant competition and microbial interactions with vascular plant roots. </div>
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<ArticleTitle>The reduced mycorrhizal colonisation (rmc) mutation of tomato disrupts five gene sequences including the CYCLOPS/IPD3 homologue.</ArticleTitle>
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<Abstract><AbstractText>Arbuscular mycorrhizal (AM) symbiosis in vascular plant roots is an ancient mutualistic interaction that evolved with land plants. More recently evolved root mutualisms have recruited components of the AM signalling pathway as identified with molecular approaches in model legume research. Earlier we reported that the reduced mycorrhizal colonisation (rmc) mutation of tomato mapped to chromosome 8. Here we report additional functional characterisation of the rmc mutation using genotype grafts and proteomic and transcriptomic analyses. Our results led to identification of the precise genome location of the Rmc locus from which we identified the mutation by sequencing. The rmc phenotype results from a deletion that disrupts five predicted gene sequences, one of which has close sequence match to the CYCLOPS/IPD3 gene identified in legumes as an essential intracellular regulator of both AM and rhizobial symbioses. Identification of two other genes not located at the rmc locus but with altered expression in the rmc genotype is also described. Possible roles of the other four disrupted genes in the deleted region are discussed. Our results support the identification of CYCLOPS/IPD3 in legumes and rice as a key gene required for AM symbiosis. The extensive characterisation of rmc in comparison with its 'parent' 76R, which has a normal mycorrhizal phenotype, has validated these lines as an important comparative model for glasshouse and field studies of AM and non-mycorrhizal plants with respect to plant competition and microbial interactions with vascular plant roots. </AbstractText>
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