Abstract
Three weeks old Solanum lycopersicum L. cvar. Rio Fuego plants , which grew in hydroponic culture, were pre-treated with 10 -7 M or 10 -4 M salicylic acid (SA) and 100 mM NaCl was added to the nutrient solution from the 6 th week. The activity of glutathione transferase (GST), glutathione peroxidase (GPOX) and dehydroascorbate reductase (DHAR) were analyzed spectrophotometrically after one week salt stress. All of these activities are connected to GST enzyme family, but the changes were different at the end of the pre-treatment or after the NaCl stress. SA enhanced the GPOX activity in the highest extent by the end of the three-week- period, while in glutathione transferase function there was no significant changes. The salt treatment mostly enhanced these enzyme activities but in the SA-pre-treated plants the GST and GPOX activities were elevated in a higher extent. In contrast to the lower SA concentra- tion, pre-treatment with 10 -4 M SA maintained the DHAR activities at the control level even in roots. Our results indicate that the increased antioxidant enzyme activities may be the part of the hardening effect of SA. GSTs can participate in the maintenance of the redox state of cells
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Claims 8
Claim · model-written summary
Salicylic acid pretreatment enhanced GPOX activity most by the end of pretreatment.
- Taxon
- Solanum lycopersicum L.
Solanum lycopersicume1 - Material
- Rio Fuegoe1
- Treatment
- SAe0
- Outcome
- GPOX activitye0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SA enhanced the GPOX activity in the highest extent by the end of the three-week- period”
e1“Three weeks old Solanum lycopersicum L. cvar. Rio Fuego plants”
Claim · model-written summary
SA caused no significant change in glutathione transferase function at the end of pretreatment.
- Taxon
- Solanum lycopersicum L.Solanum lycopersicume2
- Treatment
- SAe1
- Outcome
- glutathione transferase functione0
- Direction
- no significant changese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“while in glutathione transferase function there was no significant changes”
e1“SA enhanced the GPOX activity in the highest extent by the end of the three-week- period”
e2“Three weeks old Solanum lycopersicum L. cvar. Rio Fuego plants”
Claim · model-written summary
Salt treatment generally increased the antioxidant enzyme activities.
- Taxon
- Solanum lycopersicum L.Solanum lycopersicume2
- Treatment
- salt treatmente0
- Gene
- glutathione transferase (GST), glutathione peroxidase (GPOX) and dehydroascorbate reductase (DHAR)e1
- Outcome
- enzyme activitiese0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The salt treatment mostly enhanced these enzyme activities”
e1“The activity of glutathione transferase (GST), glutathione peroxidase (GPOX) and dehydroascorbate reductase (DHAR)”
e2“Three weeks old Solanum lycopersicum L. cvar. Rio Fuego plants”
Claim · model-written summary
SA pretreatment increased GST activity more under salt stress.
- Taxon
- Solanum lycopersicum L.Solanum lycopersicume1
- Treatment
- SA-pre-treatede0
- Outcome
- GSTe0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the SA-pre-treated plants the GST and GPOX activities were elevated in a higher extent”
e1“Three weeks old Solanum lycopersicum L. cvar. Rio Fuego plants”
Claim · model-written summary
SA pretreatment increased GPOX activity more under salt stress.
- Taxon
- Solanum lycopersicum L.Solanum lycopersicume1
- Treatment
- SA-pre-treatede0
- Outcome
- GPOXe0
- Direction
- elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the SA-pre-treated plants the GST and GPOX activities were elevated in a higher extent”
e1“Three weeks old Solanum lycopersicum L. cvar. Rio Fuego plants”
Claim · model-written summary
Pretreatment with 10 -4 M SA maintained DHAR activity at control level even in roots.
- Taxon
- Solanum lycopersicum L.Solanum lycopersicume1
- Organ / stage
- rootse0
- Treatment
- pre-treatment with 10 -4 M SAe0
- Outcome
- DHAR activitiese0
- Direction
- maintainede0
- Comparator
- the lower SA concentra- tione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In contrast to the lower SA concentra- tion, pre-treatment with 10 -4 M SA maintained the DHAR activities at the control level even in roots”
e1“Three weeks old Solanum lycopersicum L. cvar. Rio Fuego plants”
Claim · model-written summary
The authors infer increased antioxidant enzyme activity may contribute to SA hardening.
- Taxon
- Solanum lycopersicum L.Solanum lycopersicume1
- Treatment
- SAe0
- Outcome
- hardening effecte0
- Qualifier
- increased antioxidant enzyme activitiese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increased antioxidant enzyme activities may be the part of the hardening effect of SA”
e1“Three weeks old Solanum lycopersicum L. cvar. Rio Fuego plants”
Claim · model-written summary
GSTs may help maintain cellular redox state.
- Taxon
- Solanum lycopersicum L.Solanum lycopersicume1
- Gene
- GSTse0
- Outcome
- maintenance of the redox state of cellse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“GSTs can participate in the maintenance of the redox state of cells”
e1“Three weeks old Solanum lycopersicum L. cvar. Rio Fuego plants”
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