Abstract
Jasmonates are signalling molecules induced in plants as a response to various biotic and/or abiotic stresses. As ozone is known to activate defense responses in plants, we have monitored the concentration of jasmonic acid in tomato leaves during and after an acute exposure to this abiotic elicitor. In this experiment, we observed that the maximum induction of jasmonic acid in O3-fumigated plants occurred 9 h after the end of treatment and the concentration of jasmonic acid in stressed plants increased 13-fold. However, the level of endogenous methyl-jasmonate was constant during the observed period. The extraction and quantification of jasmonic acid as its methyl ester was performed by headspace-solid-phase microextraction (or HS-SPME) in combination with GC-FID and GC-MS. The sensitivity (LOD = 2 ng/g) of this method permitted the detection and quantification of jasmonic acid present in plant tissues at very low concentrations.
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Claims 4
Claim · model-written summary
Jasmonic acid induction in ozone-fumigated tomato peaked 9 h after treatment.
- Taxon
- Tomato
Solanum lycopersicumt0 - Treatment
- O3-fumigatede0
- Outcome
- maximum induction of jasmonic acide0
- Direction
- maximume0
- Value
- 9 he0
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the maximum induction of jasmonic acid in O3-fumigated plants occurred 9 h after the end of treatment”
t0“Tomato Plants”
Claim · model-written summary
Jasmonic acid concentration increased 13-fold in stressed tomato.
- Taxon
- TomatoSolanum lycopersicumt0
- Treatment
- Ozonet0
- Outcome
- concentration of jasmonic acide0
- Direction
- increasede0
- Value
- 13-folde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the concentration of jasmonic acid in stressed plants increased 13-fold”
t0“Tomato Plants Stressed by Ozone”
Claim · model-written summary
Endogenous methyl-jasmonate remained constant during observation.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- level of endogenous methyl-jasmonatee0
- Direction
- constante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the level of endogenous methyl-jasmonate was constant during the observed period”
t0“Tomato Plants”
Claim · model-written summary
The method detected jasmonic acid in plant tissues at an LOD of 2 ng/g.
- Taxon
- TomatoSolanum lycopersicumt0
- Outcome
- detection and quantification of jasmonic acide0
- Value
- 2 ng/ge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sensitivity (LOD = 2 ng/g) of this method permitted the detection and quantification of jasmonic acid present in plant tissues at very low concentrations.”
t0“Tomato Plants”
The same questions in other papers
ozone · physiology: hormones · Solanum lycopersicum (tomato)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
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.