Descripción
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Some receptor-like kinases (RLK) control plant development while others regulate immunity. The Arabidopsis ERECTA (ER) RLK regulates both biological processes. To discover specific components of ER-mediated immunity, a genetic screen was conducted to identify suppressors of erecta (ser) susceptibility to Plectosphaerella cucumerina fungus. The ser1 and ser2 mutations restored disease resistance to this pathogen to wild-type levels in the er-1 background but failed to suppress er-associated developmental phenotypes. The deposition of callose upon P. cucumerina inoculation, which was impaired in the er-1 plants, was also restored to near wild-type levels in the ser er-1 mutants. Analyses of er cell walls revealed that total neutral sugars were reduced and uronic acids increased relative to those of wild-type walls. Interestingly, in the ser er-1 walls, neutral sugars were elevated and uronic acids were reduced relative to both er-1 and wild-type plants. The cell-wall changes found in er-1 and the ser er-1 mutants are unlikely to contribute to their developmental alterations. However, they may influence disease resistance, as a positive correlation was found between uronic acids content and resistance to P. cucumerina. We propose a specific function for ER in regulating cell wall¿mediated disease resistance that is distinct from its role in development. | |
Internacional
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Si |
JCR del ISI
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Si |
Título de la revista
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MOLECULAR PLANT-MICROBE INTERACTIONS |
ISSN
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0894-0282 |
Factor de impacto JCR
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4,136 |
Información de impacto
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Volumen
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8 |
DOI
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Número de revista
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0 |
Desde la página
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953 |
Hasta la página
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963 |
Mes
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ENERO |
Ranking
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