Abstract
Selected nonpathogenic rhizobacteria with biological disease control activity are able to elicit an induced systemic resistance (ISR) response that is phenotypically similar to pathogen-induced systemic acquired resistance (SAR). Ten ecotypes of Arabidopsis thaliana were screened for their potential to express rhizobacteria-mediated ISR and pathogen-induced SAR against the leaf pathogen Pseudomonas syringae pv. tomato DC3000 (Pst). All ecotypes expressed SAR. However, of the 10 ecotypes tested, ecotypes RLD and Wassilewskija (Ws) did not develop ISR after treatment of the roots with nonpathogenic Pseudomonas fluorescens WCS417r bacteria. This nonresponsive phenotype was associated with relatively high susceptibility to Pst infection. The F1 progeny of crosses between the non-responsive ecotypes RLD and Ws on the one hand, and the responsive ecotypes Columbia (Col) and Landsberg erecta (Ler) on the other hand, were fully capable of expressing ISR and exhibited a relatively high level of basal resistance, similar to that of their WCS417r-responsive parent. This indicates that the potential to express ISR and the relatively high level of basal resistance against Pst are both inherited as dominant traits. Analysis of the F2 and F3 progeny of a Col x RLD cross revealed that inducibility of ISR and relatively high basal resistance against Pst cosegregate in a 3:1 fashion, suggesting that both resistance mechanisms are monogenically determined and genetically linked. Neither the responsiveness to WCS417r nor the relatively high level of basal resistance against Pst were complemented in the F1 progeny of crosses between RLD and Ws, indicating that RLD and Ws are both affected in the same locus, necessary for the expression of ISR and basal resistance against Pst. The corresponding locus, designated ISR1, was mapped between markers B4 and GL1 on chromosome 3. The observed association between ISR and basal resistance against Pst suggests that rhizobacteria-mediated ISR against Pst in Arabidopsis requires the presence of a single dominant gene that functions in the basal resistance response against Pst infection.
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Claims 11
Claim · model-written summary
All tested ecotypes expressed systemic acquired resistance.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianat0 - Outcome
- expressed SARe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All ecotypes expressed SAR”
t0“Ten ecotypes of Arabidopsis thaliana”
Claim · model-written summary
RLD did not develop induced systemic resistance after root treatment with WCS417r.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- RLDe0
- Treatment
- treatment of the roots with nonpathogenic Pseudomonas fluorescens WCS417r bacteriae0
- Interactor
- Pseudomonas fluorescens WCS417r
.JPG?width=60)
Pseudomonas fluorescense0symbiont - Outcome
- did not develop ISRe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
e0“ecotypes RLD and Wassilewskija (Ws) did not develop ISR after treatment of the roots with nonpathogenic Pseudomonas fluorescens WCS417r bacteria”
t0“Ten ecotypes of Arabidopsis thaliana”
Claim · model-written summary
Wassilewskija did not develop induced systemic resistance after WCS417r treatment.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- Wassilewskija (Ws)e0
- Treatment
- treatment of the roots with nonpathogenic Pseudomonas fluorescens WCS417r bacteriae0
- Interactor
- Pseudomonas fluorescens WCS417rPseudomonas fluorescense0symbiont
- Outcome
- did not develop ISRe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ecotypes RLD and Wassilewskija (Ws) did not develop ISR after treatment of the roots with nonpathogenic Pseudomonas fluorescens WCS417r bacteria”
t0“Ten ecotypes of Arabidopsis thaliana”
Claim · model-written summary
The nonresponsive phenotype was associated with higher susceptibility to Pst infection.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- nonresponsive phenotypee0
- Interactor
- Pste0pathogen
- Outcome
- susceptibility to Pst infectione0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This nonresponsive phenotype was associated with relatively high susceptibility to Pst infection”
t0“Ten ecotypes of Arabidopsis thaliana”
Claim · model-written summary
F1 progeny of responsive and nonresponsive ecotypes expressed ISR.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- F1 progenye0
- Outcome
- fully capable of expressing ISRe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The F1 progeny of crosses between the non-responsive ecotypes RLD and Ws on the one hand, and the responsive ecotypes Columbia (Col) and Landsberg erecta (Ler) on the other hand, were fully capable of expressing ISR”
t0“Ten ecotypes of Arabidopsis thaliana”
Claim · model-written summary
Those F1 progeny had relatively high basal resistance.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- F1 progenye1
- Outcome
- basal resistancee0
- Direction
- highe0
- Comparator
- WCS417r-responsive parente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exhibited a relatively high level of basal resistance, similar to that of their WCS417r-responsive parent”
e1“The F1 progeny of crosses between the non-responsive ecotypes RLD and Ws”
t0“Ten ecotypes of Arabidopsis thaliana”
Claim · model-written summary
ISR inducibility and high basal resistance cosegregated 3:1 in Col × RLD progeny.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- F2 and F3 progenye0
- Interactor
- Pste0pathogen
- Outcome
- inducibility of ISR and relatively high basal resistance against Pst cosegregatee0
- Value
- 3:1e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Analysis of the F2 and F3 progeny of a Col x RLD cross revealed that inducibility of ISR and relatively high basal resistance against Pst cosegregate in a 3:1 fashion”
t0“Ten ecotypes of Arabidopsis thaliana”
Claim · model-written summary
RLD and Ws did not complement WCS417r responsiveness in F1 crosses.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- RLD and Wse0
- Interactor
- WCS417re0symbiont
- Outcome
- responsiveness to WCS417re0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither the responsiveness to WCS417r nor the relatively high level of basal resistance against Pst were complemented in the F1 progeny of crosses between RLD and Ws”
t0“Ten ecotypes of Arabidopsis thaliana”
Claim · model-written summary
RLD and Ws did not complement basal resistance in F1 crosses.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- RLD and Wse0
- Interactor
- Pste0pathogen
- Outcome
- basal resistance against Pste0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither the responsiveness to WCS417r nor the relatively high level of basal resistance against Pst were complemented in the F1 progeny of crosses between RLD and Ws”
t0“Ten ecotypes of Arabidopsis thaliana”
Claim · model-written summary
The ISR1 locus mapped between B4 and GL1 markers on chromosome 3.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Gene
- ISR1e0
- Outcome
- mapped between markers B4 and GL1 on chromosome 3e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The corresponding locus, designated ISR1, was mapped between markers B4 and GL1 on chromosome 3”
t0“Ten ecotypes of Arabidopsis thaliana”
Claim · model-written summary
The authors infer a single dominant gene needed for ISR and basal resistance against Pst.
- Taxon
- ArabidopsisArabidopsise0
- Interactor
- Pste0pathogen
- Outcome
- rhizobacteria-mediated ISR against Pste0
- Qualifier
- single dominant gene that functions in the basal resistance response against Pst infectione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rhizobacteria-mediated ISR against Pst in Arabidopsis requires the presence of a single dominant gene that functions in the basal resistance response against Pst infection”
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See all 19 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.