Expression patterns of defense-related genes in different types of arbuscular mycorrhizal development in wild-type and mycorrhiza-defective mutant tomato.
Identifieur interne : 003776 ( Main/Exploration ); précédent : 003775; suivant : 003777Expression patterns of defense-related genes in different types of arbuscular mycorrhizal development in wild-type and mycorrhiza-defective mutant tomato.
Auteurs : Ling-Ling Gao ; Wolfgang Knogge ; Gabriele Delp ; F Andrew Smith ; Sally E. SmithSource :
- Molecular plant-microbe interactions : MPMI [ 0894-0282 ] ; 2004.
Descripteurs français
- KwdFr :
- ARN des plantes (génétique), ARN des plantes (métabolisme), ARN messager (génétique), ARN messager (métabolisme), Champignons (croissance et développement), Expression des gènes (MeSH), Gènes de plante (MeSH), Lycopersicon esculentum (génétique), Lycopersicon esculentum (microbiologie), Mutation (MeSH), Mycorhizes (croissance et développement), Mycorhizes (génétique), Phénotype (MeSH), Racines de plante (microbiologie).
- MESH :
- croissance et développement : Champignons, Mycorhizes.
- génétique : ARN des plantes, ARN messager, Lycopersicon esculentum, Mycorhizes.
- microbiologie : Lycopersicon esculentum, Racines de plante.
- métabolisme : ARN des plantes, ARN messager.
- Expression des gènes, Gènes de plante, Mutation, Phénotype.
English descriptors
- KwdEn :
- Fungi (growth & development), Gene Expression (MeSH), Genes, Plant (MeSH), Lycopersicon esculentum (genetics), Lycopersicon esculentum (microbiology), Mutation (MeSH), Mycorrhizae (genetics), Mycorrhizae (growth & development), Phenotype (MeSH), Plant Roots (microbiology), RNA, Messenger (genetics), RNA, Messenger (metabolism), RNA, Plant (genetics), RNA, Plant (metabolism).
- MESH :
- chemical , genetics : RNA, Messenger, RNA, Plant.
- genetics : Lycopersicon esculentum, Mycorrhizae.
- growth & development : Fungi, Mycorrhizae.
- chemical , metabolism : RNA, Messenger, RNA, Plant.
- microbiology : Lycopersicon esculentum, Plant Roots.
- Gene Expression, Genes, Plant, Mutation, Phenotype.
Abstract
The expression of defense-related genes was analyzed in the interactions of six arbuscular mycorrhizal (AM) fungi with the roots of wild-type tomato (Lycopersicon esculentum Mill.) cv. 76R and of the near-isogenic mycorrhiza-defective mutant rmc. Depending on the fungal species, wild-type tomato forms both major morphological AM types, Arum and Paris. The mutant rmc blocks the penetration of the root surface or invasion of the root cortex by most species of AM fungi, but one fungus has been shown to develop normal mycorrhizas. In the wild-type tomato, accumulation of mRNA representing a number of defense-related genes was low in Arum-type interactions, consistent with findings for this AM morphotype in other plant species. In contrast, Paris-type colonization, particularly by members of the family Gigasporaceae, was accompanied by a substantial transient increase in expression of some defense-related genes. However, the extent of root colonization did not differ significantly in the two wild-type AM morphotypes, suggesting that accumulation of defense gene products per se does not limit mycorrhiza development. In the mutant, interactions in which the fungus failed to penetrate the root lacked significant accumulation of defense gene mRNAs. However, phenotypes in which the fungus penetrated epidermal or hypodermal cells were associated with an enhanced and more prolonged gene expression. These results are discussed in relation to the mechanisms that may underlie the specificity of the interactions between AM fungi and the rmc mutant.
DOI: 10.1094/MPMI.2004.17.10.1103
PubMed: 15497403
Affiliations:
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Depending on the fungal species, wild-type tomato forms both major morphological AM types, Arum and Paris. The mutant rmc blocks the penetration of the root surface or invasion of the root cortex by most species of AM fungi, but one fungus has been shown to develop normal mycorrhizas. In the wild-type tomato, accumulation of mRNA representing a number of defense-related genes was low in Arum-type interactions, consistent with findings for this AM morphotype in other plant species. In contrast, Paris-type colonization, particularly by members of the family Gigasporaceae, was accompanied by a substantial transient increase in expression of some defense-related genes. However, the extent of root colonization did not differ significantly in the two wild-type AM morphotypes, suggesting that accumulation of defense gene products per se does not limit mycorrhiza development. In the mutant, interactions in which the fungus failed to penetrate the root lacked significant accumulation of defense gene mRNAs. However, phenotypes in which the fungus penetrated epidermal or hypodermal cells were associated with an enhanced and more prolonged gene expression. These results are discussed in relation to the mechanisms that may underlie the specificity of the interactions between AM fungi and the rmc mutant.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">15497403</PMID><DateCompleted><Year>2004</Year><Month>12</Month><Day>10</Day></DateCompleted><DateRevised><Year>2006</Year><Month>11</Month><Day>15</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0894-0282</ISSN><JournalIssue CitedMedium="Print"><Volume>17</Volume><Issue>10</Issue><PubDate><Year>2004</Year><Month>Oct</Month></PubDate></JournalIssue><Title>Molecular plant-microbe interactions : MPMI</Title><ISOAbbreviation>Mol Plant Microbe Interact</ISOAbbreviation></Journal><ArticleTitle>Expression patterns of defense-related genes in different types of arbuscular mycorrhizal development in wild-type and mycorrhiza-defective mutant tomato.</ArticleTitle><Pagination><MedlinePgn>1103-13</MedlinePgn></Pagination><Abstract><AbstractText>The expression of defense-related genes was analyzed in the interactions of six arbuscular mycorrhizal (AM) fungi with the roots of wild-type tomato (Lycopersicon esculentum Mill.) cv. 76R and of the near-isogenic mycorrhiza-defective mutant rmc. Depending on the fungal species, wild-type tomato forms both major morphological AM types, Arum and Paris. The mutant rmc blocks the penetration of the root surface or invasion of the root cortex by most species of AM fungi, but one fungus has been shown to develop normal mycorrhizas. In the wild-type tomato, accumulation of mRNA representing a number of defense-related genes was low in Arum-type interactions, consistent with findings for this AM morphotype in other plant species. In contrast, Paris-type colonization, particularly by members of the family Gigasporaceae, was accompanied by a substantial transient increase in expression of some defense-related genes. However, the extent of root colonization did not differ significantly in the two wild-type AM morphotypes, suggesting that accumulation of defense gene products per se does not limit mycorrhiza development. In the mutant, interactions in which the fungus failed to penetrate the root lacked significant accumulation of defense gene mRNAs. However, phenotypes in which the fungus penetrated epidermal or hypodermal cells were associated with an enhanced and more prolonged gene expression. 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