Resistance in tomato and wild relatives to crown and root rot caused by Phytophthora capsici.
Identifieur interne : 001841 ( Main/Exploration ); précédent : 001840; suivant : 001842Resistance in tomato and wild relatives to crown and root rot caused by Phytophthora capsici.
Auteurs : L M Quesada-Ocampo [États-Unis] ; M K HausbeckSource :
- Phytopathology [ 0031-949X ] ; 2010.
Descripteurs français
- KwdFr :
- Interactions hôte-pathogène (MeSH), Lycopersicon esculentum (génétique), Lycopersicon esculentum (immunologie), Lycopersicon esculentum (microbiologie), Maladies des plantes (immunologie), Maladies des plantes (microbiologie), Phytophthora (physiologie), Solanum (génétique), Solanum (immunologie), Solanum (microbiologie).
- MESH :
- génétique : Lycopersicon esculentum, Solanum.
- immunologie : Lycopersicon esculentum, Maladies des plantes, Solanum.
- microbiologie : Lycopersicon esculentum, Maladies des plantes, Solanum.
- physiologie : Phytophthora.
- Interactions hôte-pathogène.
English descriptors
- KwdEn :
- Host-Pathogen Interactions (MeSH), Lycopersicon esculentum (genetics), Lycopersicon esculentum (immunology), Lycopersicon esculentum (microbiology), Phytophthora (physiology), Plant Diseases (immunology), Plant Diseases (microbiology), Solanum (genetics), Solanum (immunology), Solanum (microbiology).
- MESH :
- genetics : Lycopersicon esculentum, Solanum.
- immunology : Lycopersicon esculentum, Plant Diseases, Solanum.
- microbiology : Lycopersicon esculentum, Plant Diseases, Solanum.
- physiology : Phytophthora.
- Host-Pathogen Interactions.
Abstract
Phytophthora capsici causes root, crown, and fruit rot of tomato, a major vegetable crop grown worldwide. The objective of this study was to screen tomato cultivars and wild relatives of tomato for resistance to P. capsici. Four P. capsici isolates were individually used to inoculate 6-week-old seedlings (1 g of P. capsici-infested millet seed per 10 g of soilless medium) of 42 tomato cultivars and wild relatives of tomato in a greenhouse. Plants were evaluated daily for wilting and death. All P. capsici isolates tested caused disease in seedlings but some isolates were more pathogenic than others. A wild relative of cultivated tomato, Solanum habrochaites accession LA407, was resistant to all P. capsici isolates tested. Moderate resistance to all isolates was identified in the host genotypes Ha7998, Fla7600, Jolly Elf, and Talladega. P. capsici was frequently recovered from root and crown tissue of symptomatic inoculated seedlings but not from leaf tissue or asymptomatic or control plants. The phenotype of the recovered isolate matched the phenotype of the inoculum. Pathogen presence was confirmed in resistant and moderately resistant tomato genotypes by species-specific polymerase chain reaction of DNA from infected crown and root tissue. Amplified fragment length polymorphisms of tomato genotypes showed a lack of correlation between genetic clusters and susceptibility to P. capsici, indicating that resistance is distributed in several tomato lineages. The results of this study create a baseline for future development of tomato cultivars resistant to P. capsici.
DOI: 10.1094/PHYTO-100-6-0619
PubMed: 20465418
Affiliations:
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Le document en format XML
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hôte-pathogène</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Phytophthora capsici causes root, crown, and fruit rot of tomato, a major vegetable crop grown worldwide. The objective of this study was to screen tomato cultivars and wild relatives of tomato for resistance to P. capsici. Four P. capsici isolates were individually used to inoculate 6-week-old seedlings (1 g of P. capsici-infested millet seed per 10 g of soilless medium) of 42 tomato cultivars and wild relatives of tomato in a greenhouse. Plants were evaluated daily for wilting and death. All P. capsici isolates tested caused disease in seedlings but some isolates were more pathogenic than others. A wild relative of cultivated tomato, Solanum habrochaites accession LA407, was resistant to all P. capsici isolates tested. Moderate resistance to all isolates was identified in the host genotypes Ha7998, Fla7600, Jolly Elf, and Talladega. P. capsici was frequently recovered from root and crown tissue of symptomatic inoculated seedlings but not from leaf tissue or asymptomatic or control plants. The phenotype of the recovered isolate matched the phenotype of the inoculum. Pathogen presence was confirmed in resistant and moderately resistant tomato genotypes by species-specific polymerase chain reaction of DNA from infected crown and root tissue. Amplified fragment length polymorphisms of tomato genotypes showed a lack of correlation between genetic clusters and susceptibility to P. capsici, indicating that resistance is distributed in several tomato lineages. The results of this study create a baseline for future development of tomato cultivars resistant to P. capsici.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">20465418</PMID><DateCompleted><Year>2010</Year><Month>07</Month><Day>13</Day></DateCompleted><DateRevised><Year>2010</Year><Month>05</Month><Day>14</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0031-949X</ISSN><JournalIssue CitedMedium="Print"><Volume>100</Volume><Issue>6</Issue><PubDate><Year>2010</Year><Month>Jun</Month></PubDate></JournalIssue><Title>Phytopathology</Title><ISOAbbreviation>Phytopathology</ISOAbbreviation></Journal><ArticleTitle>Resistance in tomato and wild relatives to crown and root rot caused by Phytophthora capsici.</ArticleTitle><Pagination><MedlinePgn>619-27</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1094/PHYTO-100-6-0619</ELocationID><Abstract><AbstractText>Phytophthora capsici causes root, crown, and fruit rot of tomato, a major vegetable crop grown worldwide. The objective of this study was to screen tomato cultivars and wild relatives of tomato for resistance to P. capsici. Four P. capsici isolates were individually used to inoculate 6-week-old seedlings (1 g of P. capsici-infested millet seed per 10 g of soilless medium) of 42 tomato cultivars and wild relatives of tomato in a greenhouse. Plants were evaluated daily for wilting and death. All P. capsici isolates tested caused disease in seedlings but some isolates were more pathogenic than others. A wild relative of cultivated tomato, Solanum habrochaites accession LA407, was resistant to all P. capsici isolates tested. Moderate resistance to all isolates was identified in the host genotypes Ha7998, Fla7600, Jolly Elf, and Talladega. P. capsici was frequently recovered from root and crown tissue of symptomatic inoculated seedlings but not from leaf tissue or asymptomatic or control plants. The phenotype of the recovered isolate matched the phenotype of the inoculum. Pathogen presence was confirmed in resistant and moderately resistant tomato genotypes by species-specific polymerase chain reaction of DNA from infected crown and root tissue. Amplified fragment length polymorphisms of tomato genotypes showed a lack of correlation between genetic clusters and susceptibility to P. capsici, indicating that resistance is distributed in several tomato lineages. 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