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Systemic response to avirulent bacterial infection
William Truman, -- (--)
Experiment design (9 hybridizations)
pathogen inoculation
•P-syr DC3000 •P-syr DC3000(hrpA) •P-syr DC3000(avrRpm1)

This experiment has been imported by PLEXdb from NCBI GEO (GSE6831) Series_summary: In the absence of adaptive immunity displayed by animals, ...[complete overview]

Experiment     Expression     Hybridizations & Samples     Quality Control     Compare Treatments     Downloads    

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Experiment Name: Systemic response to avirulent bacterial infection
Accession No: AT66
Microarray: ATH1-121501
Visibility: public
Experiment Type:
Experiment Factor(s):
pathogen inoculation
•P-syr DC3000   •P-syr DC3000(hrpA)   •P-syr DC3000(avrRpm1)
Quality Control: biological replicates
Treatment summary:
 pathogen inoculation  # replicates
 P-syr DC3000  3
 P-syr DC3000(hrpA)  3
 P-syr DC3000(avrRpm1)  3
Total hybridizations: 9
Description: This experiment has been imported by PLEXdb from NCBI GEO (GSE6831)

Series_summary:
In the absence of adaptive immunity displayed by animals, plants respond locally to biotic challenge via inducible basal defense networks activated through recognition and response toconserved pathogen associated molecular patterns (PAMPs). In addition, immunity can be induced in tissues remote from infection sites via systemic acquired resistance (SAR), initiated following gene-for-gene recognition between plant resistance proteins and microbial effectors.The nature of the mobile signal and remotely activated networks responsible for establishing SAR remain unclear.
Here we show that despite the absence of PAMP contact, systemically responding leaves rapidly activate a SAR transcriptional signature with strong similarity to local basal defense. Jasmonates have previously been implicated in systemic signalling in response to wounding and plant herbivory but not SAR. We present several lines of evidence that suggest jasmonates may also be central to SAR. Jasmonic acid (JA) rapidly accumulates in phloem exudates of leaves challenged with an avirulent strain of Pseudomonas syringae. In systemically responding leaves transcripts associated with jasmonate biosynthesis are upregulated and JA increases transiently. SAR can be mimicked by foliar JA application and is abrogated in mutants impaired in jasmonate synthesis or response.
We conclude that, jasmonate signalling appears to mediate long-distance information transmission. Moreover, the systemic transcriptional response shares extraordinary overlap with local herbivory and wounding responses, indicating that jasmonates may be central to an evolutionarily conserved signalling network, which decodes multiple abiotic and biotic stress signals.
Experimenter name: William Truman
Experimenter phone: +44 (0)1392 263789
Experimenter fax: +44 (0)1392 263434
Experimenter address: School of Biosciences
Experimenter address: Geoffrey Pope Building
Experimenter address: Stocker Road
Experimenter address: Exeter
Experimenter address: Devon
Experimenter zip/postal_code: EX4 4QD
Experimenter country: UK
Keywords: infection

Series_overall_design:
9 samples were used in this experiment
Publication: none
Created: 2010-08-04 12:25:46
Last Update: 2010-08-04 12:46:08
Released: 2010-08-05
GEO Accession GSE6831
Submitter: PLEXdb Curator
Name: William Truman
Institution: --
Head of Laboratory: --
email(s):
Homepage:

 
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