Expression profiling of Col-0 and rps2 treated with Psm:AvrRpt2
Ontology highlight
ABSTRACT:
ORGANISM(S): Arabidopsis thaliana
PROVIDER: GSE72742 | GEO | 2016/09/01
SECONDARY ACCESSION(S): PRJNA294798
REPOSITORIES: GEO
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Project description:Identification of differential gene expression during RPS2-mediated effector-triggered immunity in Arabidopsis Four-week-old leaves of Arabidopsis Col-0 wild type and rps2 mutant plant were infiltrated with Pseudomonas syringae pv. Maculicola carring effector AvrRpt2 at OD 0.01. Samples were collected at 0, 6 and 10 hours after infiltration for WT plants and at 0 and 10 hours after infiltration for rps2 plants. Three biological replicates were performed per genotype per time point.
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Project description:Identification of AvrRpt2-mediated differential gene expression in Arabidopsis Four-week-old leaves of Arabidopsis Col-0 plant were infiltrated with Pseudomonas syringae pv. Maculicola carring effector AvrRpt2 at OD0.01. Samples were collected at 0 or 6 hours after infiltration. Each time point contains three biological replicates.
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Project description:Effector-Triggered Immunity (ETI) and Pattern-Triggered Immunity (PTI) are well-defined modes of plant immunity triggered by recognition of pathogen effector proteins and microbe-associated molecular patterns, respectively. While ETI and PTI network extensively share signaling components, the shared components are used in different ways, resulting in distinct network properties in the model plant Arabidopsis: immunity is highly robust against network perturbations in ETI but relatively sensitive in PTI. However, the molecular mechanism how the shared network leads to the different properties is not known. Here we show that sustained MAPK activation compensate salicylic acid (SA) signaling.
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Project description:Plant resistance inducers (PRIs) are compounds that protect crops from diseases by activating plant immunity. The exogenous treatment with glutamate (Glu), an important amino acid for living organisms, was shown to induce resistance against fungal pathogen in rice and tomato. To understand the molecular mechanism of Glu-induced immunity, we developed a model system using Arabidopsis thaliana. Here, we found that exogenous treatment with Glu to Arabidopsis enhances resistance against Pseudomonas syringae pv. tomato DC3000 and Colletotrichum higginsianum. Consistently, transcriptome analyses of Arabidopsis seedlings treated with Glu showed that Glu significantly induces the expression of wound, defense, and stress related genes. Interestingly, Glu activates the expression of pathogen or damage associated molecular patterns (PAMP or DAMP)–inducible genes at much later time points than PAMP/DAMPs normally do. Moreover, expression of Glu-inducible genes does not require known components of PAMP receptor complex, glutamate receptors, salicylic acid-biosynthesis enzyme, or glutamate decarboxylase. In addition, Glu also enhances PAMP-inducible immune responses, such as production of reactive oxygen species and mitogen-activated protein kinase activation. These results show that Glu activates PAMP/DAMP-triggered immunity signaling pathway in a novel manner.
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Project description:Effector-Triggered Immunity (ETI) and Pattern-Triggered Immunity (PTI) are well-defined modes of plant immunity triggered by recognition of pathogen effector proteins and microbe-associated molecular patterns, respectively. While ETI and PTI network extensively share signaling components, the shared components are used in different ways, resulting in distinct network properties in the model plant Arabidopsis: immunity is highly robust against network perturbations in ETI but relatively sensitive in PTI. However, the molecular mechanism how the shared network leads to the different properties is not known. Here we show that salicylic acid (SA) reponsive genes can respond in the absense of SA during ETI. A 24 DNA microarray study using total RNA from Arabidopsis wildtype Col-0 and sid2-2 mutant infected with Pto hrcC-, Pto EV, Pto AvrRpt2 or water.
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