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| Home > Publications database > Barley Rom1 antagonizes Rar1 function in Magnaporthe oryzae-infected leaves by enhancing epidermal and diminishing mesophyll defence |
| Home > Publications database > Barley Rom1 antagonizes Rar1 function in Magnaporthe oryzae-infected leaves by enhancing epidermal and diminishing mesophyll defence |
| Journal Article | PreJuSER-210 |
; ;
2008
Wiley-Blackwell
Oxford [u.a.]
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Please use a persistent id in citations: doi:10.1111/j.1469-8137.2008.02597.x
Abstract: * Barley (Hordeum vulgare) is a host for Blumeria graminis f. sp. hordei (Bgh), which causes powdery mildew, and for the rice blast pathogen Magnaporthe oryzae. It has previously been shown that Rar1, initially identified in a mutational screen as being required for Mla12-specified Bgh-resistance, also controlled pathogenic growth of M. oryzae in barley. Here, we tested whether the rom1 mutation (restoration of Mla12-specified resistance), which restored resistance against Bgh in a susceptible rar1-2 genetic background, also influences the interaction between barley and M. oryzae. * Disease severity after infection with M. oryzae was analysed on rar1-2 mutants and rar1-2 rom1 double mutants. Microscopy and northern analysis were used to gain insight into cellular and molecular events. * On rar1-2 rom1 double mutant plants, the number of M. oryzae disease lesions was increased in comparison to the wild-type and the rar1-2 mutant which correlated with augmented epidermal penetration. However, a decrease in the lesion diameter, apparently conditioned in the mesophyll, was also observed. * These results highlight the impact of Rom1 in basal defence of barley against different pathogens. Importantly, a tissue-specific function for Rom1 with contrasting effects on epidermal and mesophyll defence was demonstrated.
Keyword(s): Carrier Proteins: genetics (MeSH) ; Carrier Proteins: metabolism (MeSH) ; Genes, Plant (MeSH) ; Hordeum: cytology (MeSH) ; Hordeum: genetics (MeSH) ; Hordeum: microbiology (MeSH) ; Host-Pathogen Interactions: genetics (MeSH) ; Magnaporthe: pathogenicity (MeSH) ; Mutation (MeSH) ; Plant Diseases: genetics (MeSH) ; Plant Leaves: genetics (MeSH) ; Plant Leaves: physiology (MeSH) ; Plant Proteins: genetics (MeSH) ; Plant Proteins: metabolism (MeSH) ; Virulence (MeSH) ; Carrier Proteins ; Plant Proteins ; Rar1 protein, Hordeum vulgare ; J ; Hordeum vulgare (barley) (auto) ; Magnaporthe oryzae (rice blast) (auto) ; Mlo (auto) ; papillae (auto) ; powdery mildew (auto) ; Rar1 (auto) ; Rom1 (auto) ; plant defence (auto)
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