Abstract
Many pathogens are virulent because they specifically interfere with host defense responses and therefore can proliferate. Here, we report that virulent strains of the bacterial phytopathogen Pseudomonas syringae induce systemic susceptibility to secondary P. syringae infection in the host plant Arabidopsis thaliana. This systemic induced susceptibility (SIS) is in direct contrast to the well studied avirulence/R gene-dependent resistance response known as the hypersensitive response that elicits systemic acquired resistance. We show that P. syringae-elicited SIS is caused by the production of coronatine (COR), a pathogen-derived functional and structural mimic of the phytohormone jasmonic acid (JA). These data suggest that SIS may be a consequence of the previously described mutually antagonistic interaction between the salicylic acid and JA signaling pathways. Virulent P. syringae also has the potential to induce net systemic susceptibility to herbivory by an insect (Trichoplusia ni, cabbage looper), but this susceptibility is not caused by COR. Rather, consistent with its role as a JA mimic, COR induces systemic resistance to T. ni. These data highlight the complexity of defense signaling interactions among plants, pathogens, and herbivores.
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Claims 6
Claim · model-written summary
Virulent P. syringae strains induced systemic susceptibility to secondary P. syringae infection in Arabidopsis thaliana.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae1 - Treatment
- virulent strains of the bacterial phytopathogen Pseudomonas syringaee1
- Interactor
- Pseudomonas syringae
Pseudomonas syringaee1pathogen - Outcome
- systemic susceptibility to secondary P. syringae infectione1
- Direction
- inducee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Virulent strains of the bacterial phytopathogen Pseudomonas syringae induce systemic susceptibility to secondary P. syringae infection in the host plant Arabidopsis thaliana”
Claim · model-written summary
Systemic induced susceptibility elicited by P. syringae is caused by coronatine (COR) production.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Interactor
- P. syringaePseudomonas syringaee2pathogen
- Compound
- coronatine (COR)e2
- Outcome
- SISe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Virulent strains of the bacterial phytopathogen Pseudomonas syringae induce systemic susceptibility to secondary P. syringae infection in the host plant Arabidopsis thaliana”
e2“P. syringae-elicited SIS is caused by the production of coronatine (COR), a pathogen-derived functional and structural mimic of the phytohormone jasmonic acid (JA)”
Claim · model-written summary
Systemic induced susceptibility may be a consequence of antagonism between salicylic acid and JA signaling.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Outcome
- SISe3
- Qualifier
- mutually antagonistic interaction between the salicylic acid and JA signaling pathwayse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Virulent strains of the bacterial phytopathogen Pseudomonas syringae induce systemic susceptibility to secondary P. syringae infection in the host plant Arabidopsis thaliana”
e3“These data suggest that SIS may be a consequence of the previously described mutually antagonistic interaction between the salicylic acid and JA signaling pathways”
Claim · model-written summary
Virulent P. syringae induced net systemic susceptibility to herbivory by Trichoplusia ni in Arabidopsis thaliana.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Treatment
- Virulent P. syringaee4
- Interactor
- Trichoplusia ni
Trichoplusia nie4herbivore - Second interactor
- P. syringaePseudomonas syringaee4pathogen
- Outcome
- net systemic susceptibility to herbivorye4
- Direction
- inducee4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Virulent strains of the bacterial phytopathogen Pseudomonas syringae induce systemic susceptibility to secondary P. syringae infection in the host plant Arabidopsis thaliana”
e4“Virulent P. syringae also has the potential to induce net systemic susceptibility to herbivory by an insect (Trichoplusia ni, cabbage looper)”
Claim · model-written summary
The systemic susceptibility to herbivory induced by virulent P. syringae is not caused by COR.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Compound
- CORe5
- Outcome
- this susceptibilitye5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Virulent strains of the bacterial phytopathogen Pseudomonas syringae induce systemic susceptibility to secondary P. syringae infection in the host plant Arabidopsis thaliana”
e5“but this susceptibility is not caused by COR”
Claim · model-written summary
COR induced systemic resistance to Trichoplusia ni in Arabidopsis thaliana.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Treatment
- CORe6
- Interactor
- T. nie6herbivore
- Outcome
- systemic resistancee6
- Direction
- inducese6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Virulent strains of the bacterial phytopathogen Pseudomonas syringae induce systemic susceptibility to secondary P. syringae infection in the host plant Arabidopsis thaliana”
e6“consistent with its role as a JA mimic, COR induces systemic resistance to T. ni”
The same questions in other papers
Pseudomonas syringae · disease · Arabidopsis thaliana (thale cress)Positive and negative results
1 paper in the same direction as this paper · 5 in the opposite direction
- negative
- positive
- positive
3 papers more in this group
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