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Descripción
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| The Rboh genes (Respiratory burst oxidase homologs) from the plant NADPH oxidase are responsible for the production of reactive oxygen species (ROS) in response to pathogens and other responses to the environment (Torres et al., 2005). In response to ozone, there is also a production of ROS similar to the pathogen response, where the Rboh and heterotrimeric G proteins have been implicated (Joo et al., 2005) Our goal is to characterize the functional interaction between the Arabidopsis Atrboh and the heterotrimeric G proteins in the context of the pathogen response. We performed epistasis studies between the NADPH oxidase mutants atrbohD and atrbohF and mutants in the ¿ (gpa1-4) and ß (agb1-2) subunits of the heterotrimeric G proteins. We observe that agb1-2 suppresses the mutant phenotypes in the atrboh in response to bacteria and the oomycete Hyaloperonospora Arabidopsis (Torres et al., 2002). This positions the heterotrimeric G proteins downstream of the Atrboh. However, agb1-2 and the atrboh show an additive effect on susceptibility to the necrotrophic fungus Plectosphaerella cucumerina, which suggest two different pathways. There is, therefore, a complex relationship between the signaling of ROS produced by NADPH oxidase and the heterotrimeric G proteins, where the functional interaction between these regulatory systems varies depending on the context of the pathogen. | |
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Internacional
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No |
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Nombre congreso
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XIV International Congress International Society Molecular Plant Microbe Interactions 2009. |
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Tipo de participación
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960 |
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Lugar del congreso
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Quebec City (Canada) |
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Revisores
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Si |
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ISBN o ISSN
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DOI
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Fecha inicio congreso
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19/07/2009 |
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Fecha fin congreso
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23/07/2009 |
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Desde la página
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19 |
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Hasta la página
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19 |
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Título de las actas
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XIV International Congress International Society Molecular Plant Microbe Interactions 2009. |