Abstract
The effects of treatment with jasmonic acid (JA) of wheat (Triticum aestivum L, cv. Elegia) coleoptiles on the generation of superoxide anion-radical (O 2 ·− ), the activity of extracellular peroxidase, enzymatic and non-enzymatic components of the antioxidant system were studied. During the first hour after the start of coleoptile treatment with 1 μM JA, the generation of O 2 ·− was enhanced and the extracellular peroxidase was activated. During following 23 h, these effects were gradually reduced. JA-enhanced O 2 ·− generation was partially suppressed by coleoptile treatment with the inhibitor of peroxidase salicylhydroxamic acid, the inhibitor of NADPH-oxidase imidazol, and also the calcium chelator EGTA. Under the influence of JA treatment, antioxidant enzymes (superoxide dismutase, catalase, ascorbate peroxidase, and soluble guaiacol peroxidase) in wheat coleoptiles were activated. Treatment with JA improved coleoptile tolerance to damaging heating (10 min at 43°C); it favored the maintenance of the pools of enzymatic and non-enzymatic antioxidants. The inhibitors of NADPH-oxidase and peroxidase, and also calcium chelator reduced a positive JA influence on coleoptile thermotolerance. The role of changes in the pro-/antioxidant balance in plant tissues for the realization of stress-defensive JA effects is discussed.
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Claims 13
Claim · model-written summary
Jasmonic acid enhanced superoxide generation during the first hour.
Not reportedTaxonComparator
Verbatim
e0“During the first hour after the start of coleoptile treatment with 1 μM JA, the generation of O 2 ·− was enhanced”
Claim · model-written summary
Jasmonic acid activated extracellular peroxidase during the first hour.
Not reportedTaxonComparator
Verbatim
e0“During the first hour after the start of coleoptile treatment with 1 μM JA, the generation of O 2 ·− was enhanced and the extracellular peroxidase was activated”
Claim · model-written summary
The initial superoxide and peroxidase responses gradually diminished over the following 23 hours.
Not reportedTaxon
Verbatim
e0“During following 23 h, these effects were gradually reduced”
Claim · model-written summary
Salicylhydroxamic acid partially suppressed JA-enhanced superoxide generation.
- Treatment
- salicylhydroxamic acide0
- Outcome
- JA-enhanced O 2 ·− generatione0
- Direction
- suppressede0
- Qualifier
- partiallye0
Not reportedTaxonComparator
Verbatim
e0“JA-enhanced O 2 ·− generation was partially suppressed by coleoptile treatment with the inhibitor of peroxidase salicylhydroxamic acid”
Claim · model-written summary
Imidazol partially suppressed JA-enhanced superoxide generation.
Not reportedTaxonComparator
Verbatim
e0“JA-enhanced O 2 ·− generation was partially suppressed by coleoptile treatment with the inhibitor of peroxidase salicylhydroxamic acid, the inhibitor of NADPH-oxidase imidazol”
Claim · model-written summary
EGTA partially suppressed JA-enhanced superoxide generation.
Not reportedTaxonComparator
Verbatim
e0“JA-enhanced O 2 ·− generation was partially suppressed by coleoptile treatment with the inhibitor of peroxidase salicylhydroxamic acid, the inhibitor of NADPH-oxidase imidazol, and also the calcium chelator EGTA”
Claim · model-written summary
JA activated superoxide dismutase, catalase and ascorbate peroxidase in wheat coleoptiles.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- JA treatmente0
- Outcome
- superoxide dismutase, catalase, ascorbate peroxidasee0
- Direction
- activatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the influence of JA treatment, antioxidant enzymes (superoxide dismutase, catalase, ascorbate peroxidase, and soluble guaiacol peroxidase) in wheat coleoptiles were activated”
Claim · model-written summary
JA activated soluble guaiacol peroxidase in wheat coleoptiles.
- Taxon
- wheatTriticum aestivume0
- Treatment
- JA treatmente0
- Outcome
- soluble guaiacol peroxidasee0
- Direction
- activatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under the influence of JA treatment, antioxidant enzymes (superoxide dismutase, catalase, ascorbate peroxidase, and soluble guaiacol peroxidase) in wheat coleoptiles were activated”
Claim · model-written summary
JA improved coleoptile tolerance to ten minutes of heating at 43°C.
- Treatment
- JAe0
- Outcome
- coleoptile tolerance to damaging heatinge0
- Direction
- improvede0
- Qualifier
- 10 min at 43°Ce0
Not reportedTaxonComparator
Verbatim
e0“Treatment with JA improved coleoptile tolerance to damaging heating (10 min at 43°C)”
Claim · model-written summary
JA favored maintenance of enzymatic and non-enzymatic antioxidant pools under heating.
Not reportedTaxonTreatmentComparator
Verbatim
e0“it favored the maintenance of the pools of enzymatic and non-enzymatic antioxidants”
Claim · model-written summary
NADPH-oxidase inhibitors reduced the beneficial JA effect on thermotolerance.
- Treatment
- inhibitors of NADPH-oxidasee0
- Outcome
- positive JA influence on coleoptile thermotolerancee0
- Direction
- reducede0
Not reportedTaxonComparator
Verbatim
e0“The inhibitors of NADPH-oxidase and peroxidase, and also calcium chelator reduced a positive JA influence on coleoptile thermotolerance”
Claim · model-written summary
Peroxidase inhibitors reduced the beneficial JA effect on thermotolerance.
Not reportedTaxonComparator
Verbatim
e0“The inhibitors of NADPH-oxidase and peroxidase, and also calcium chelator reduced a positive JA influence on coleoptile thermotolerance”
Claim · model-written summary
Calcium chelator reduced the beneficial JA effect on thermotolerance.
- Treatment
- calcium chelatore0
- Outcome
- positive JA influence on coleoptile thermotolerancee0
- Direction
- reducede0
Not reportedTaxonComparator
Verbatim
e0“The inhibitors of NADPH-oxidase and peroxidase, and also calcium chelator reduced a positive JA influence on coleoptile thermotolerance”
The same questions in other papers
jasmonic acid · disease · Triticum aestivum (wheat)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
Peroxidase · tolerance: abiotic · Triticum aestivum (wheat)Results agree
1 paper in the same direction as this paper
- negative
jasmonic acid · physiology: antioxidant enzymes · Triticum aestivum (wheat)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 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.