Insights into the role of iron in disease resitance of rice plants
The production of reactive oxygen species (ROS) is one of the earliest events in the plant defense response to pathogen attack. ROS play important roles in both pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI) and effector-triggered immunity (ETI). In this work, we show that ric...
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| Tipo de recurso: | tesis de maestría |
| Estado: | Versión publicada |
| Fecha de publicación: | 2020 |
| País: | Chile |
| OAI Identifier: | oai:repositorio.anid.cl:10533/246366 |
| Acceso en línea: | https://hdl.handle.net/10533/246366 |
| Access Level: | acceso abierto |
| Palabra clave: | Ciencias Naturales Otras Ciencias Naturales |
| Sumario: | The production of reactive oxygen species (ROS) is one of the earliest events in the plant defense response to pathogen attack. ROS play important roles in both pathogen-associated molecular pattern (PAMP)-triggered immunity (PTI) and effector-triggered immunity (ETI). In this work, we show that rice plants grown under high iron (Fe) supply exhibit resistance to infection by the rice blast fungus Magnaporthe oryzae. The mechanisms by which Fe might affect resistance to M.oryzae infection in rice were investigated, focusing on oxidative stress. These studies revealed higher accumulation of hydrogen peroxide (H2O2) in M. oryzae-infected plants that have been grown under with high Fe supply compared to plants grown under normal and low Fe supply. The increase in H2O2 was accompanied by an increase in superoxide radical (O-2). Treatment with high Fe also results in malondialdehyde (MDA) accumulation, suggesting that ferroptosis mediated by lipid peroxides might occur during M. oryzae infection. In addition, a strong induction of genes involved in ROS regulation and repression in ROS detoxifying genes were observed. Collectively, these results suggest that the oxidative stress generated by excess Fe might contribute to resistance to M. oryzae in rice plants. |
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