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Vogt I, Wöhner T, Richter K, Flachowsky H, Sundin GW, Wensing A, Savory EA, Geider K, Day B, Hanke MV, Peil A. Gene-for-gene relationship in the host-pathogen system Malus × robusta 5-Erwinia amylovora. THE NEW PHYTOLOGIST 2013; 197:1262-1275. [PMID: 23301854 DOI: 10.1111/nph.12094] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Accepted: 11/10/2012] [Indexed: 05/20/2023]
Abstract
Fire blight is a destructive bacterial disease caused by Erwinia amylovora affecting plants in the family Rosaceae, including apple. Host resistance to fire blight is present mainly in accessions of Malus spp. and is thought to be quantitative in this pathosystem. In this study we analyzed the importance of the E. amylovora effector avrRpt2(EA) , a homolog of Pseudomonas syringae avrRpt2, for resistance of Malus × robusta 5 (Mr5). The deletion mutant E. amylovora Ea1189ΔavrRpt2(EA) was able to overcome the fire blight resistance of Mr5. One single nucleotide polymorphism (SNP), resulting in an exchange of cysteine to serine in the encoded protein, was detected in avrRpt2(EA) of several Erwinia strains differing in virulence to Mr5. E. amylovora strains encoding serine (S-allele) were able to overcome resistance of Mr5, whereas strains encoding cysteine (C-allele) were not. Allele specificity was also observed in a coexpression assay with Arabidopsis thaliana RIN4 in Nicotiana benthamiana. A homolog of RIN4 has been detected and isolated in Mr5. These results suggest a system similar to the interaction of RPS2 from A. thaliana and AvrRpt2 from P. syringae with RIN4 as guard. Our data are suggestive of a gene-for-gene relationship for the host-pathogen system Mr5 and E. amylovora.
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Affiliation(s)
- Isabelle Vogt
- Julius Kühn-Institut, Institute for Breeding Research on Horticultural and Fruit Crops, Pillnitzer Platz 3a, D-01326, Dresden, Germany
| | - Thomas Wöhner
- Julius Kühn-Institut, Institute for Breeding Research on Horticultural and Fruit Crops, Pillnitzer Platz 3a, D-01326, Dresden, Germany
| | - Klaus Richter
- Julius Kühn-Institut, Institute for Resistance Research and Stress Tolerance, Erwin-Baur-Str. 27, 06484, Quedlinburg, Germany
| | - Henryk Flachowsky
- Julius Kühn-Institut, Institute for Breeding Research on Horticultural and Fruit Crops, Pillnitzer Platz 3a, D-01326, Dresden, Germany
| | - George W Sundin
- Department of Plant Pathology, Michigan State University, East Lansing, MI, 48824, USA
| | - Annette Wensing
- Julius Kühn-Institut, Institute for Plant Protection in Fruit Crops and Viticulture, Schwabenheimer Straße101, 69221, Dossenheim, Germany
| | - Elizabeth A Savory
- Department of Plant Pathology, Michigan State University, East Lansing, MI, 48824, USA
| | - Klaus Geider
- Julius Kühn-Institut, Institute for Plant Protection in Fruit Crops and Viticulture, Schwabenheimer Straße101, 69221, Dossenheim, Germany
| | - Brad Day
- Department of Plant Pathology, Michigan State University, East Lansing, MI, 48824, USA
| | - Magda-Viola Hanke
- Julius Kühn-Institut, Institute for Breeding Research on Horticultural and Fruit Crops, Pillnitzer Platz 3a, D-01326, Dresden, Germany
| | - Andreas Peil
- Julius Kühn-Institut, Institute for Breeding Research on Horticultural and Fruit Crops, Pillnitzer Platz 3a, D-01326, Dresden, Germany
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