Molecular defense responses of apple genotypes in compatible and incompatible interactions with Erwinia amylovora
Erwinia amylovora is the causal agent of fire blight, a bacterial disease of apple and pear. Pathogenicity determinants of the bacteria are identified (hrp-dsp cluster, capsule, siderophore) but molecular mechanisms leading to susceptibility or resistance of the plant are not yet understood. To addr...
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| Format: | Article |
| Language: | English |
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Czech Academy of Agricultural Sciences
2002-06-01
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| Series: | Plant Protection Science |
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| Online Access: | https://pps.agriculturejournals.cz/artkey/pps-200210-0013_molecular-defense-responses-of-apple-genotypes-in-compatible-and-incompatible-interactions-with-erwinia-amylovo.php |
| _version_ | 1797898650387480576 |
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| author | M.N. Brisset J.S. Venisse J.P. Paulin |
| author_facet | M.N. Brisset J.S. Venisse J.P. Paulin |
| author_sort | M.N. Brisset |
| collection | DOAJ |
| description | Erwinia amylovora is the causal agent of fire blight, a bacterial disease of apple and pear. Pathogenicity determinants of the bacteria are identified (hrp-dsp cluster, capsule, siderophore) but molecular mechanisms leading to susceptibility or resistance of the plant are not yet understood. To address this question, we challenged two genotypes of apple, known for their contrasting susceptibility to fire blight, with a wild-type strain of E. amylovora (Ea wt), an avirulent hrp mutant of this bacteria (Ea hrp) or a wild-type strain of the incompatible pathogen Pseudomonas syringae pv. tabaci (Pst wt). Mechanisms usually related to resistance responses were investigated i.e. oxidative stress, accumulation of PR-proteins and induction of genes encoding various enzymes of the phenylpropanoid pathway. Results showed two kinds of responses (i) some mechanisms were elicited in both susceptible and resistant genotypes by Ea wt and Pst wt with similar kinetics and not induced by Ea hrp, (ii) others were specifically repressed by Ea wt in its susceptible host, when induced by Pst wt and Ea hrp. These results suggest several hypothesis about the cross-talk between E. amylovora and its host plants. |
| first_indexed | 2024-04-10T08:16:28Z |
| format | Article |
| id | doaj.art-9f6809b8ea62428193d5cdfb1c7a6bd3 |
| institution | Directory Open Access Journal |
| issn | 1212-2580 1805-9341 |
| language | English |
| last_indexed | 2024-04-10T08:16:28Z |
| publishDate | 2002-06-01 |
| publisher | Czech Academy of Agricultural Sciences |
| record_format | Article |
| series | Plant Protection Science |
| spelling | doaj.art-9f6809b8ea62428193d5cdfb1c7a6bd32023-02-23T03:43:39ZengCzech Academy of Agricultural SciencesPlant Protection Science1212-25801805-93412002-06-0138SI 1 - 6th Conf EFPPS139S14010.17221/10339-PPSpps-200210-0013Molecular defense responses of apple genotypes in compatible and incompatible interactions with Erwinia amylovoraM.N. Brisset0J.S. Venisse1J.P. Paulin2*UMR Pathologie Végétale INRA/INH/UA and*UMR Pathologie Végétale INRA/INH/UA and*UMR Pathologie Végétale INRA/INH/UA andErwinia amylovora is the causal agent of fire blight, a bacterial disease of apple and pear. Pathogenicity determinants of the bacteria are identified (hrp-dsp cluster, capsule, siderophore) but molecular mechanisms leading to susceptibility or resistance of the plant are not yet understood. To address this question, we challenged two genotypes of apple, known for their contrasting susceptibility to fire blight, with a wild-type strain of E. amylovora (Ea wt), an avirulent hrp mutant of this bacteria (Ea hrp) or a wild-type strain of the incompatible pathogen Pseudomonas syringae pv. tabaci (Pst wt). Mechanisms usually related to resistance responses were investigated i.e. oxidative stress, accumulation of PR-proteins and induction of genes encoding various enzymes of the phenylpropanoid pathway. Results showed two kinds of responses (i) some mechanisms were elicited in both susceptible and resistant genotypes by Ea wt and Pst wt with similar kinetics and not induced by Ea hrp, (ii) others were specifically repressed by Ea wt in its susceptible host, when induced by Pst wt and Ea hrp. These results suggest several hypothesis about the cross-talk between E. amylovora and its host plants.https://pps.agriculturejournals.cz/artkey/pps-200210-0013_molecular-defense-responses-of-apple-genotypes-in-compatible-and-incompatible-interactions-with-erwinia-amylovo.phperwinia amylovoradefensecompatibilityincompatibilityhrp mutant |
| spellingShingle | M.N. Brisset J.S. Venisse J.P. Paulin Molecular defense responses of apple genotypes in compatible and incompatible interactions with Erwinia amylovora Plant Protection Science erwinia amylovora defense compatibility incompatibility hrp mutant |
| title | Molecular defense responses of apple genotypes in compatible and incompatible interactions with Erwinia amylovora |
| title_full | Molecular defense responses of apple genotypes in compatible and incompatible interactions with Erwinia amylovora |
| title_fullStr | Molecular defense responses of apple genotypes in compatible and incompatible interactions with Erwinia amylovora |
| title_full_unstemmed | Molecular defense responses of apple genotypes in compatible and incompatible interactions with Erwinia amylovora |
| title_short | Molecular defense responses of apple genotypes in compatible and incompatible interactions with Erwinia amylovora |
| title_sort | molecular defense responses of apple genotypes in compatible and incompatible interactions with erwinia amylovora |
| topic | erwinia amylovora defense compatibility incompatibility hrp mutant |
| url | https://pps.agriculturejournals.cz/artkey/pps-200210-0013_molecular-defense-responses-of-apple-genotypes-in-compatible-and-incompatible-interactions-with-erwinia-amylovo.php |
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