Abstract
Salicylic acid (SA) applied exogenously is a potential priming agent during abiotic stress. In our experiments, the priming effect of SA was tested by exposing Arabidopsis thaliana (L.) Heynh. plants to 2-week-long 10-9-10-5 M SA pretreatments in a hydroponic medium, followed by 1 week of 100mM NaCl stress. The levels of reactive oxygen species and H2O2, changes in antioxidant enzyme activity and the expression of selected glutathione transferase (GST) genes were investigated. Although 10-9-10-7 M SA pretreatment insufficiently induced defence mechanisms during the subsequent salt stress, 2-week pretreatments with 10-6 and 10-5 M SA alleviated the salinity-induced H2O2 and malondialdehyde accumulation, and increased superoxide dismutase, guaiacol peroxidase, GST and glutathione peroxidase (GPOX) activity. Our results indicate that long-term 10-6 and 10-5 M SA treatment mitigated the salt stress injury in this model plant. Enhanced expression of AtGSTU19 and AtGSTU24 may be responsible for the induced GST and GPOX activity, which may play an important role in acclimation. Modified GST expression suggested altered signalling in SA-hardened plants during salt stress. The hydroponic system applied in our experiments proved to be a useful tool for studying the effects of sequential treatments in A. thaliana.
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Claims 7
Claim · model-written summary
Low-dose SA pretreatment insufficiently induced defense during subsequent salt stress.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianat0 - Treatment
- 10-9-10-7 M SA pretreatmente0
- Outcome
- defence mechanismse0
- Direction
- insufficiently inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“10-9-10-7 M SA pretreatment insufficiently induced defence mechanisms during the subsequent salt stress”
t0“Arabidopsis thaliana”
Claim · model-written summary
Pretreatment with 10-6 and 10-5 M SA alleviated salt-induced H2O2 and malondialdehyde accumulation.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- 2-week pretreatments with 10-6 and 10-5 M SAe0
- Outcome
- salinity-induced H2O2 and malondialdehyde accumulatione0
- Direction
- alleviatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“2-week pretreatments with 10-6 and 10-5 M SA alleviated the salinity-induced H2O2 and malondialdehyde accumulation”
t0“Arabidopsis thaliana”
Claim · model-written summary
Pretreatment with 10-6 and 10-5 M SA increased superoxide dismutase and guaiacol peroxidase activity.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- 2-week pretreatments with 10-6 and 10-5 M SAe0
- Outcome
- superoxide dismutase, guaiacol peroxidase, GST and glutathione peroxidase (GPOX) activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“2-week pretreatments with 10-6 and 10-5 M SA alleviated the salinity-induced H2O2 and malondialdehyde accumulation, and increased superoxide dismutase, guaiacol peroxidase, GST and glutathione peroxidase (GPOX) activity.”
t0“Arabidopsis thaliana”
Claim · model-written summary
Long-term 10-6 and 10-5 M SA treatment mitigated salt stress injury.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- long-term 10-6 and 10-5 M SA treatmente0
- Outcome
- salt stress injurye0
- Direction
- mitigatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“long-term 10-6 and 10-5 M SA treatment mitigated the salt stress injury in this model plant.”
t0“Arabidopsis thaliana”
Claim · model-written summary
Enhanced AtGSTU19 and AtGSTU24 expression may explain induced GST and GPOX activity.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Gene
- AtGSTU19 and AtGSTU24e0
- Outcome
- induced GST and GPOX activitye0
- Qualifier
- may be responsiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Enhanced expression of AtGSTU19 and AtGSTU24 may be responsible for the induced GST and GPOX activity”
t0“Arabidopsis thaliana”
Claim · model-written summary
Modified GST expression suggested altered signaling in SA-hardened plants during salt stress.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Gene
- GSTe0
- Outcome
- altered signallinge0
- Qualifier
- SA-hardened plants during salt stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Modified GST expression suggested altered signalling in SA-hardened plants during salt stress.”
t0“Arabidopsis thaliana”
Claim · model-written summary
The hydroponic system proved useful for studying sequential treatment effects in Arabidopsis.
- Taxon
- A. thalianaArabidopsis thalianae0
- Outcome
- useful tool for studying the effects of sequential treatmentse0
- Comparator
- sequential treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hydroponic system applied in our experiments proved to be a useful tool for studying the effects of sequential treatments in A. thaliana.”
t0“Arabidopsis thaliana”
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