Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcriptome sequencing of tomato leaves treated with different Pst DC3000 mutant strains

ABSTRACT: We designed an experiment to assess ETI and PTI in RG-PtoR using a series of Pst DC3000 strains which have different mutations that allow dissection of the plant immune response. We collected samples at 6 hai and monitored the development of disease in these plants. Plants infiltrated with DC3000 ΔfliC had no disease symptoms due to the recognition of AvrPto and AvrPtoB effectors by Pto. In contrast, when these two effectors were absent, the plants developed speck disease (DC3000 ΔavrPto ΔavrPtoB and DC3000 ΔavrPto ΔavrPtoB ΔfliC strains). Plants infiltrated with the triple mutant showed the greatest disease severity due to the absence of ETI and flagellin-activated PTI induction. This experimental design allowed us to identify gene expression changes associated with flagellin-activated PTI (DC3000 ΔavrPto ΔavrPtoB versus DC3000 ΔavrPto ΔavrPtoB ΔfliC) and Pto/Prf-mediated ETI (DC3000 ΔfliC versus DC3000 ΔavrPto ΔavrPtoB ΔfliC). NOTE: Samples in SRA were assigned the same sample accession. This is incorrect as there are different samples, hence 'Source Name' was replaced with new values. Comment[ENA_SAMPLE] contains the original SRA sample accessions.

INSTRUMENT(S): Illumina HiSeq 2000

ORGANISM(S): Solanum lycopersicum

SUBMITTER: Greg Martin

PROVIDER: E-MTAB-4797 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Transcriptomic analysis reveals tomato genes whose expression is induced specifically during effector-triggered immunity and identifies the Epk1 protein kinase which is required for the host response to three bacterial effector proteins.

Pombo Marina A MA Zheng Yi Y Fernandez-Pozo Noe N Dunham Diane M DM Fei Zhangjun Z Martin Gregory B GB

Genome biology 20140101 10

<h4>Background</h4>Plants have two related immune systems to defend themselves against pathogen attack. Initially,pattern-triggered immunity is activated upon recognition of microbe-associated molecular patterns by pattern recognition receptors. Pathogenic bacteria deliver effector proteins into the plant cell that interfere with this immune response and promote disease. However, some plants express resistance proteins that detect the presence of specific effectors leading to a robust defense re ...[more]

PMID: 25323444

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Project description:Plants have evolved a two-layered immune system that mainly includes pattern-triggered immunity (PTI) and effector-triggered immunity (ETI) against pathogen attack. PTI and ETI signaling are functionally linked, but also distinct due to specific perceived ligands and activation modes. Unraveling how PTI and ETI coordinate the immune responses against pathogens is crucial for understanding the regulatory mechanisms in plant immunity. To better understand the protein profiling and phosphorylation events during PTI and ETI, we employed integrated whole proteome and phosphoproteome analyses in the tomato-Pst pathosystem with different Pst DC3000 mutants that allow dissection of different layers of immune responses. A total of 225 proteins and 79 phosphopeptides were differentially regulated in tomato leaves during immune responses. Our proteomics results indicate that some overlapping immune responses are triggered by both PTI and ETI-inducing treatment, and ETI response is more robust than PTI response for most proteins. The change patterns of protein abundance and phosphorylation revealed some key regulators involved in Ca2+ signaling, mitogen-activated protein kinase cascades, and reversible protein phosphorylation, ROS and redox homeostasis, direct defense, transcription machinery and protein turnover, cell wall remodeling, hormone biosynthesis, as well as immune molecule accumulation, are modulated during PTI and/or ETI, suggesting their common or specific roles in plant immune responses. However, NAC domain protein and lipid particle serine esterase, two PTI-specific genes from previous transcriptomic work, have not been detected as differentially regulated in our proteomic analysis, and they were proved to be not PTI-specific inducible and therefore cannot be used as PTI-reporters through “overlapping circle” pattern assay. These results provide insights into the fine-tuned regulatory mechanisms between PTI and ETI in-Pst pathosystem, which will springboard further investigations into the sophisticated mechanisms in plant immunity.

Dataset Information

Transcriptome sequencing of tomato leaves treated with different Pst DC3000 mutant strains

Publications

Transcriptomic analysis reveals tomato genes whose expression is induced specifically during effector-triggered immunity and identifies the Epk1 protein kinase which is required for the host response to three bacterial effector proteins.

Similar Datasets

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