Abstract
High salinity causes ionic, osmotic, and oxidative stresses to plants, and the antioxidant enzyme Catalase2 (CAT2) plays a vital role in this process, while how CAT2 expression is regulated during plant response to high salinity remains elusive. Here, we report that phytohormone jasmonic acid (JA) impairs plant salt stress tolerance by repressing CAT2 expression in an MYC2-dependent manner. Exogenous JA application decreased plant salt stress tolerance while the jar1 mutant with reduced bioactive JA-Ile accumulation showed enhanced salt stress tolerance. JA enhanced salt-induced hydrogen peroxide (H 2 O 2 ) accumulation, while treatment with H 2 O 2 -scavenger glutathione compromised such effects of JA on plant H 2 O 2 accumulation and salt stress tolerance. In addition, JA repressed CAT2 expression in salt-stressed wild-type plant but not in myc2 , a mutant of the master transcriptional factor MYC2 in JA signaling, therefore, the myc2 mutant exhibited increased salt stress tolerance. Further study showed that mutation of CAT2 largely reverted lower reactive oxygen species (ROS) accumulation, higher CAT activity, and enhanced salt stress tolerance of the myc2 mutant in myc2 cat2-1 double mutant, revealing that CAT2 functions downstream JA-MYC2 module in plant response to high salinity. Together, our study reveals that JA impairs Arabidopsis seedling salt stress tolerance through MYC2-mediated repression of CAT2 expression.
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Claims 12
Claim · model-written summary
Exogenous JA application decreased salt stress tolerance of Arabidopsis seedlings.
- Taxon
- Arabidopsis
Arabidopsist0 - Treatment
- Exogenous JA applicatione1
- Outcome
- salt stress tolerancee1
- Direction
- decreasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impairs Arabidopsis Seedling Salt Stress Tolerance”
e1“Exogenous JA application decreased plant salt stress tolerance”
Claim · model-written summary
The jar1 mutant with reduced bioactive JA-Ile accumulation showed enhanced salt stress tolerance.
- Taxon
- ArabidopsisArabidopsist0
- Material
- jar1 mutante2
- Treatment
- reduced bioactive JA-Ile accumulatione2
- Compound
- JA-Ilee2
- Outcome
- salt stress tolerancee2
- Direction
- enhancede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impairs Arabidopsis Seedling Salt Stress Tolerance”
e2“the jar1 mutant with reduced bioactive JA-Ile accumulation showed enhanced salt stress tolerance”
Claim · model-written summary
JA enhanced salt-induced hydrogen peroxide accumulation in Arabidopsis seedlings.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- JAe3
- Outcome
- salt-induced hydrogen peroxide (H 2 O 2 ) accumulatione3
- Direction
- enhancede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impairs Arabidopsis Seedling Salt Stress Tolerance”
e3“JA enhanced salt-induced hydrogen peroxide (H 2 O 2 ) accumulation”
Claim · model-written summary
The H2O2 scavenger glutathione compromised the effects of JA on H2O2 accumulation and on salt stress tolerance.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- H 2 O 2 -scavenger glutathionee4
- Compound
- glutathionee4
- Outcome
- effects of JA on plant H 2 O 2 accumulation and salt stress tolerancee4
- Direction
- compromisede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impairs Arabidopsis Seedling Salt Stress Tolerance”
e4“treatment with H 2 O 2 -scavenger glutathione compromised such effects of JA on plant H 2 O 2 accumulation and salt stress tolerance”
Claim · model-written summary
JA repressed CAT2 expression in salt-stressed wild-type plants.
- Taxon
- ArabidopsisArabidopsist0
- Material
- wild-typee5
- Treatment
- JAe5
- Gene
- CAT2e5
- Outcome
- CAT2 expressione5
- Direction
- repressede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impairs Arabidopsis Seedling Salt Stress Tolerance”
e5“JA repressed CAT2 expression in salt-stressed wild-type plant but not in myc2”
Claim · model-written summary
JA did not repress CAT2 expression in the myc2 mutant under salt stress.
- Taxon
- ArabidopsisArabidopsist0
- Material
- myc2e5
- Treatment
- JAe5
- Gene
- CAT2e5
- Outcome
- CAT2 expressione5
- Direction
- no_changeinferrede5
- Comparator
- wild-type plante5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impairs Arabidopsis Seedling Salt Stress Tolerance”
e5“JA repressed CAT2 expression in salt-stressed wild-type plant but not in myc2”
Claim · model-written summary
The myc2 mutant exhibited increased salt stress tolerance.
- Taxon
- ArabidopsisArabidopsist0
- Material
- myc2 mutante7
- Treatment
- salt stresse7
- Outcome
- salt stress tolerancee7
- Direction
- increasede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impairs Arabidopsis Seedling Salt Stress Tolerance”
e7“therefore, the myc2 mutant exhibited increased salt stress tolerance”
Claim · model-written summary
Mutation of CAT2 reverted the lower ROS accumulation of the myc2 mutant.
- Taxon
- ArabidopsisArabidopsist0
- Material
- myc2 cat2-1 double mutante6
- Treatment
- mutation of CAT2e6
- Outcome
- lower reactive oxygen species (ROS) accumulatione6
- Direction
- revertede6
- Comparator
- myc2 mutante6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impairs Arabidopsis Seedling Salt Stress Tolerance”
e6“mutation of CAT2 largely reverted lower reactive oxygen species (ROS) accumulation, higher CAT activity, and enhanced salt stress tolerance of the myc2 mutant in myc2 cat2-1 double mutant”
Claim · model-written summary
Mutation of CAT2 reverted the higher CAT activity of the myc2 mutant.
- Taxon
- ArabidopsisArabidopsist0
- Material
- myc2 cat2-1 double mutante6
- Treatment
- mutation of CAT2e6
- Outcome
- higher CAT activitye6
- Direction
- revertede6
- Comparator
- myc2 mutante6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impairs Arabidopsis Seedling Salt Stress Tolerance”
e6“mutation of CAT2 largely reverted lower reactive oxygen species (ROS) accumulation, higher CAT activity, and enhanced salt stress tolerance of the myc2 mutant in myc2 cat2-1 double mutant”
Claim · model-written summary
Mutation of CAT2 reverted the enhanced salt stress tolerance of the myc2 mutant.
- Taxon
- ArabidopsisArabidopsist0
- Material
- myc2 cat2-1 double mutante6
- Treatment
- mutation of CAT2e6
- Outcome
- enhanced salt stress tolerancee6
- Direction
- revertede6
- Comparator
- myc2 mutante6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impairs Arabidopsis Seedling Salt Stress Tolerance”
e6“mutation of CAT2 largely reverted lower reactive oxygen species (ROS) accumulation, higher CAT activity, and enhanced salt stress tolerance of the myc2 mutant in myc2 cat2-1 double mutant”
Claim · model-written summary
JA impairs Arabidopsis seedling salt stress tolerance through MYC2-mediated repression of CAT2 expression.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- CAT2e6
- Compound
- JAe6
- Outcome
- salt stress tolerancee6
- Qualifier
- through MYC2-mediated repressione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impairs Arabidopsis Seedling Salt Stress Tolerance”
e6“JA impairs Arabidopsis seedling salt stress tolerance through MYC2-mediated repression of CAT2 expression”
Claim · model-written summary
CAT2 functions downstream of the JA-MYC2 module in plant response to high salinity.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- CAT2e0
- Outcome
- plant response to high salinitye0
- Qualifier
- functions downstream JA-MYC2 modulee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Impairs Arabidopsis Seedling Salt Stress Tolerance”
e0“CAT2 functions downstream JA-MYC2 module in plant response to high salinity”
The same questions in other papers
jasmonic acid · tolerance: abiotic · ArabidopsisResults differ
1 in the opposite direction
- positive
jasmonic acid · physiology: oxidative · ArabidopsisPositive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
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.