Abstract
The production of reactive oxygen species (ROS) is one of the first defense reactions induced in arabidopsis in response to infection by the pectinolytic enterobacterium Dickeya dadantii. Previous results also suggest that abscisic acid (ABA) favors D. dadantii multiplication and spread into its hosts. Here, we confirm this hypothesis using ABA-deficient and ABA-overproducer arabidopsis plants. We investigated the relationships between ABA status and ROS production in arabidopsis after D. dadantii infection and showed that ABA status modulates the capacity of the plant to produce ROS in response to infection by decreasing the production of class III peroxidases. This mechanism takes place independently of the well-described oxidative stress related to the RBOHD NADPH oxidase. In addition to this weakening of plant defense, ABA content in the plant correlates positively with the production of some bacterial virulence factors during the first stages of infection. Both processes should enhance disease progression in presence of high ABA content. Given that infection increases transcript abundance for the ABA biosynthesis genes AAO3 and ABA3 and triggers ABA accumulation in leaves, we propose that D. dadantii manipulates ABA homeostasis as part of its virulence strategy.
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Claims 8
Claim · model-written summary
ABA status modulates the capacity of Arabidopsis to produce ROS in response to D. dadantii infection.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianat0 - Material
- ABA-deficient and ABA-overproducere1
- Treatment
- infectione2
- Interactor
- D. dadantii
-_Bacterial_soft_rot.jpg?width=60)
Dickeya dadantiie2pathogen - Outcome
- capacity of the plant to produce ROSe2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
-_Bacterial_soft_rot.jpg?width=500)
Verbatim
t0“Arabidopsis thaliana”
e1“using ABA-deficient and ABA-overproducer arabidopsis plants”
e2“after D. dadantii infection and showed that ABA status modulates the capacity of the plant to produce ROS in response to infection”
Claim · model-written summary
ABA decreases production of class III peroxidases in Arabidopsis during infection.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- ABA statuse2
- Outcome
- production of class III peroxidasese7
- Direction
- decreasinge7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis thaliana”
e2“after D. dadantii infection and showed that ABA status modulates the capacity of the plant to produce ROS in response to infection”
e7“by decreasing the production of class III peroxidases”
Claim · model-written summary
ABA content in Arabidopsis correlates positively with production of bacterial virulence factors early in infection.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Compound
- ABAe4
- Outcome
- production of some bacterial virulence factorse4
- Direction
- correlates positivelye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis thaliana”
e4“ABA content in the plant correlates positively with the production of some bacterial virulence factors during the first stages of infection”
Claim · model-written summary
D. dadantii infection increases transcript abundance of the ABA biosynthesis genes AAO3 and ABA3 in Arabidopsis.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- infectione6
- Gene
- AAO3 and ABA3e6
- Outcome
- transcript abundancee6
- Direction
- increasese6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis thaliana”
e6“infection increases transcript abundance for the ABA biosynthesis genes AAO3 and ABA3 and triggers ABA accumulation in leaves”
Claim · model-written summary
D. dadantii infection triggers ABA accumulation in Arabidopsis leaves.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- infectione6
- Outcome
- ABA accumulation in leavese6
- Direction
- increaseinferrede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis thaliana”
e6“infection increases transcript abundance for the ABA biosynthesis genes AAO3 and ABA3 and triggers ABA accumulation in leaves”
Claim · model-written summary
D. dadantii manipulates ABA homeostasis in Arabidopsis as part of its virulence strategy.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Interactor
- D. dadantiiDickeya dadantiie7pathogen
- Outcome
- ABA homeostasise7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis thaliana”
e7“we propose that D. dadantii manipulates ABA homeostasis as part of its virulence strategy”
Claim · model-written summary
The ABA-linked peroxidase mechanism of ROS weakening takes place independently of RBOHD-dependent oxidative stress in Arabidopsis.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Gene
- RBOHDe3
- Outcome
- oxidative stresse3
- Qualifier
- independentlye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis thaliana”
e3“This mechanism takes place independently of the well-described oxidative stress related to the RBOHD NADPH oxidase”
Claim · model-written summary
High ABA content is expected to enhance disease progression in Arabidopsis infected by D. dadantii.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Outcome
- disease progressione5
- Qualifier
- high ABA contente5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Arabidopsis thaliana”
e5“Both processes should enhance disease progression in presence of high ABA content”
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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.