Abstract
The effects of exogenous jasmonic acid (JA) on antioxidant enzymes in four-week-old leaves of wild-type Arabidopsis thaliana L. (Columbia-0) and jin1 (jasmonate insensitive 1) mutant plants with defective jasmonate signaling were investigated under normal conditions and under salt stress (200 mM NaCl, 24 h). The wild-type plants responded to JA by an increase in the activities of Cu/Zn superoxide dismutase, catalase, and guaiacol peroxidase, while there was no change in the case of the mutant plants. In response to the salt stress of both the wild-type and mutant genotypes, the activities of superoxide dismutase, catalase, and guaiacol peroxidase were unchanged, decreased, and increased, respectively. The JA-treated wild type plants showed the highest activity of all three enzymes as compared with the mutant plants. Salinity caused a decrease in chlorophyll content in the wild-type and jin 1 plants. Preliminary JA treatment of the Col-0 plants resulted in a normal content of photosynthetic pigments after the salt stress, while the positive JA effect was insignificant in the jin 1 mutants. It was concluded that the MYC2/JIN 1 protein is involved in the JA signal transduction and plant adaptation to salt stress.
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Claims 10
Claim · model-written summary
JA increased three antioxidant enzyme activities in wild type plants.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianat0 - Material
- wild-type plantse0
- Treatment
- JAe0
- Outcome
- activities of Cu/Zn superoxide dismutase, catalase, and guaiacol peroxidasee0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The wild-type plants responded to JA by an increase in the activities of Cu/Zn superoxide dismutase, catalase, and guaiacol peroxidase”
t0“Arabidopsis thaliana”
Claim · model-written summary
JA did not change these enzyme activities in mutant plants.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- mutant plantse0
- Treatment
- JAe0
- Outcome
- activities of Cu/Zn superoxide dismutase, catalase, and guaiacol peroxidasee0
- Direction
- no changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The wild-type plants responded to JA by an increase in the activities of Cu/Zn superoxide dismutase, catalase, and guaiacol peroxidase, while there was no change in the case of the mutant plants”
t0“Arabidopsis thaliana plants with defective jasmonate signaling”
Claim · model-written summary
Salt stress left superoxide dismutase activity unchanged in both genotypes.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- salt stresse0
- Outcome
- activities of superoxide dismutasee0
- Direction
- unchangede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In response to the salt stress of both the wild-type and mutant genotypes, the activities of superoxide dismutase, catalase, and guaiacol peroxidase were unchanged, decreased, and increased, respectively.”
t0“Arabidopsis thaliana”
Claim · model-written summary
Salt stress decreased catalase activity in both genotypes.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- salt stresse0
- Outcome
- catalasee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In response to the salt stress of both the wild-type and mutant genotypes, the activities of superoxide dismutase, catalase, and guaiacol peroxidase were unchanged, decreased, and increased, respectively.”
t0“Arabidopsis thaliana”
Claim · model-written summary
Salt stress increased guaiacol peroxidase activity in both genotypes.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- salt stresse0
- Outcome
- guaiacol peroxidasee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In response to the salt stress of both the wild-type and mutant genotypes, the activities of superoxide dismutase, catalase, and guaiacol peroxidase were unchanged, decreased, and increased, respectively.”
t0“Arabidopsis thaliana”
Claim · model-written summary
JA treated wild type plants had the highest activity of all three enzymes compared with mutants.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- JA-treatede0
- Outcome
- activity of all three enzymese0
- Direction
- higheste0
- Comparator
- mutant plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The JA-treated wild type plants showed the highest activity of all three enzymes as compared with the mutant plants.”
t0“Arabidopsis thaliana”
Claim · model-written summary
Salinity decreased chlorophyll content in wild type and mutant plants.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- Salinitye0
- Outcome
- chlorophyll contente0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity caused a decrease in chlorophyll content in the wild-type and jin 1 plants.”
t0“Arabidopsis thaliana”
Claim · model-written summary
JA pretreatment maintained normal photosynthetic pigment content after salt stress in Col-0.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- Col-0e0
- Treatment
- Preliminary JA treatmente0
- Outcome
- content of photosynthetic pigmentse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Preliminary JA treatment of the Col-0 plants resulted in a normal content of photosynthetic pigments after the salt stress”
t0“Arabidopsis thaliana”
Claim · model-written summary
The positive JA effect was insignificant in jin 1 mutants.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Material
- jin 1 mutantse0
- Treatment
- JAe0
- Outcome
- positive JA effecte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while the positive JA effect was insignificant in the jin 1 mutants.”
t0“Arabidopsis thaliana”
Claim · model-written summary
The authors conclude that MYC2/JIN 1 participates in JA signaling and salt adaptation.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Gene
- MYC2/JIN 1e0
- Outcome
- plant adaptation to salt stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It was concluded that the MYC2/JIN 1 protein is involved in the JA signal transduction and plant adaptation to salt stress.”
t0“Arabidopsis thaliana”
The same questions in other papers
salinity · physiology: antioxidant enzymes · Arabidopsis thaliana (thale cress)Positive and negative results
1 in the opposite direction
- 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.