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Descripción
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| Although accumulating evidence indicates that tolerance is a plant defence strategy against pathogens as widespread as resistance, how plants evolve tolerance is poorly understood. Theory predicts that hosts will evolve to maximize tolerance or resistance, but not both. Remarkably, most experimental works failed in finding this trade-off. We tested the hypothesis that the evolution of tolerance to one pathogen is traded-off against tolerance to others, rather than against resistance, and identified the associated mechanisms. To do so, we challenged 18 Arabidopsis thaliana accessions with various isolates of Turnip mosaic virus (TuMV) and Cucumber mosaic virus (CMV). First, we characterized plant life-history trait modifications associated with reduced effects of TuMV and CMV on plant seed production (fecundity tolerance) and life period (mortality tolerance). Second, we analysed resistance-tolerance and tolerance-tolerance trade-offs upon virus infection. Results indicate that tolerance to TuMV is associated with changes in the length of the pre-reproductive and reproductive periods, and tolerance to CMV with resource reallocation from growth to reproduction; and that tolerance to TuMV is traded-off against tolerance to CMV in a virulence-dependent manner. This work provides novel insights on the mechanisms of plant tolerance, and highlights the importance of considering multi-pathogen interactions to understand the evolution of plant defences. | |
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Internacional
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Si |
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Nombre congreso
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10th WORKSHOP IN VIRUS EVOLUTION |
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Tipo de participación
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960 |
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Lugar del congreso
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State College, Pennsylvania (USA) |
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Revisores
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Si |
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ISBN o ISSN
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000-00-0000-000-0 |
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DOI
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Fecha inicio congreso
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07/03/2019 |
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Fecha fin congreso
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10/03/2019 |
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Desde la página
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1 |
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Hasta la página
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1 |
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Título de las actas
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Abstracts |