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PMID:12609040

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Citation

de Torres, M, Sanchez, P, Fernandez-Delmond, I and Grant, M (2003) Expression profiling of the host response to bacterial infection: the transition from basal to induced defence responses in RPM1-mediated resistance. Plant J. 33:665-76

Abstract

Changes in transcription in leaves of Arabidopsis thaliana were characterised following challenge with strains of Pseudomonas syringae pv. tomato DC3000 allowing differentiation of basal resistance (hrpA mutants), gene-specific resistance (RPM1-specified interactions) and susceptibility (wild-type pathogen). In planta avirulence gene induction, changes in host [Ca2+]cyt and leaf collapse were used to delineate the transition from infection to induced resistance. The plant responds rapidly, dynamically and discriminately to infection by phytopathogenic bacteria. Within the first 2 h host transcriptional changes are common to all challenges indicating that Type III effector function does not contribute to early events in host transcriptome re-programming. The timing of induction for specific transcripts was reproducible, hierarchical and modulated at least in part through EDS1 function. R gene-specific transcripts were not observed until 3 h after inoculation. Intriguingly, the R gene-specific response proteins are expected to localise to diverse cellular addresses indicative of a global impact on cellular homeostasis. The altered transcriptional response rapidly manifests into initial symptoms of leaf collapse within 2 h, although establishment of the full macroscopic HR occurs significantly later.

Links

PubMed

Keywords

Arabidopsis/genetics; Arabidopsis/microbiology; Arabidopsis Proteins/genetics; Arabidopsis Proteins/metabolism; Bacteria/growth & development; Bacteria/pathogenicity; Calcium/metabolism; DNA, Complementary/genetics; DNA-Binding Proteins/genetics; DNA-Binding Proteins/metabolism; Gene Expression Profiling; Gene Expression Regulation, Plant; Immunity, Innate/genetics; Immunity, Innate/physiology; Plant Diseases/genetics; Plant Diseases/microbiology; Polymorphism, Restriction Fragment Length; RNA, Plant/genetics; RNA, Plant/metabolism; Signal Transduction/genetics; Signal Transduction/physiology; Transcriptional Activation

Significance

Annotations

Gene product Qualifier GO Term Evidence Code with/from Aspect Extension Notes Status

ARATH:LOX4

involved_in

GO:0009617: response to bacterium

ECO:0000270: expression pattern evidence used in manual assertion

P

Seeded From UniProt

complete

ARATH:LOX4

involved_in

GO:0009611: response to wounding

ECO:0000270: expression pattern evidence used in manual assertion

P

Seeded From UniProt

complete


See also

References

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