Abstract
The effects of silicon application before sowing on the drought-induced oxidative stress and antioxidant defense in wheat (Triticum aestivum L.) were investigated. Drought stress was applied by withholding watering till sampling at booting or filling stage. Application of Si increased the water potential of drought-stressed plants at filling stage, whereas it did not at booting stage. The superoxide dismutase (SOD) activity was inhibited and peroxidase (POD) activity was enhanced by drought at booting stage, and no differences were observed due to the Si treatment. At filling stage, however, application of Si increased the SOD activity and decreased the POD activity of drought-stressed plants. The catalase (CAT) activity was slightly increased by drought only in the absence of Si and at booting stage. The activity of glutathione reductase (GR) was not greatly influenced. Application of Si did not change the contents of H2O2, total soluble protein and protein carbonyl of drought-stressed plants at booting stage, whereas at filling stage, it decreased the content of H2O2 and protein carbonyl and increased the content of total soluble protein. The content of thiobarbituric acid reactive substances (TBARS) and the activities of acid phospholipase (AP) and lipoxygenase (LOX) in drought-stressed plants were also decreased by application of Si at both stages.
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Claims 15
Claim · model-written summary
Silicon raised water potential in drought-stressed wheat at filling.
- Taxon
- drought-stressed plantse0
- Organ / stage
- filling stagee0
- Treatment
- Application of Sie0
- Outcome
- water potentiale0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“Application of Si increased the water potential of drought-stressed plants at filling stage”
Claim · model-written summary
Silicon did not affect water potential at booting.
- Taxon
- wheat
Triticum aestivumt0 - Organ / stage
- booting stagee0
- Treatment
- Application of Sie0
- Outcome
- water potentiale0
- Direction
- did note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of Si increased the water potential of drought-stressed plants at filling stage, whereas it did not at booting stage”
t0“wheat”
Claim · model-written summary
Drought inhibited SOD activity at booting.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- booting stagee0
- Treatment
- droughte0
- Gene
- superoxide dismutase (SOD)e0
- Outcome
- superoxide dismutase (SOD) activitye0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The superoxide dismutase (SOD) activity was inhibited and peroxidase (POD) activity was enhanced by drought at booting stage”
t0“wheat”
Claim · model-written summary
Drought enhanced POD activity at booting.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- booting stagee0
- Treatment
- droughte0
- Gene
- peroxidase (POD)e0
- Outcome
- peroxidase (POD) activitye0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The superoxide dismutase (SOD) activity was inhibited and peroxidase (POD) activity was enhanced by drought at booting stage”
t0“wheat”
Claim · model-written summary
Silicon did not alter SOD or POD activity at booting.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- booting stagee1
- Treatment
- Si treatmente0
- Outcome
- superoxide dismutase (SOD) activity was inhibited and peroxidase (POD) activitye1
- Direction
- no differencese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no differences were observed due to the Si treatment”
e1“The superoxide dismutase (SOD) activity was inhibited and peroxidase (POD) activity was enhanced by drought at booting stage”
t0“wheat”
Claim · model-written summary
Silicon increased SOD activity in drought-stressed plants at filling.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- filling stagee0
- Treatment
- application of Sie0
- Gene
- SODe0
- Outcome
- SOD activitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At filling stage, however, application of Si increased the SOD activity and decreased the POD activity of drought-stressed plants.”
t0“wheat”
Claim · model-written summary
Silicon decreased POD activity in drought-stressed plants at filling.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- filling stagee0
- Treatment
- application of Sie0
- Gene
- PODe0
- Outcome
- POD activitye0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At filling stage, however, application of Si increased the SOD activity and decreased the POD activity of drought-stressed plants.”
t0“wheat”
Claim · model-written summary
Drought slightly increased CAT activity without silicon at booting.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- droughte0
- Gene
- catalase (CAT)e0
- Outcome
- catalase (CAT) activitye0
- Direction
- increasede0
- Qualifier
- only in the absence of Si and at booting stagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The catalase (CAT) activity was slightly increased by drought only in the absence of Si and at booting stage”
t0“wheat”
Claim · model-written summary
GR activity was not greatly influenced.
- Taxon
- wheatTriticum aestivumt0
- Gene
- glutathione reductase (GR)e0
- Outcome
- activity of glutathione reductase (GR)e0
- Direction
- not greatly influencede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The activity of glutathione reductase (GR) was not greatly influenced”
t0“wheat”
Claim · model-written summary
Silicon did not change H2O2, total soluble protein or protein carbonyl contents at booting.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- booting stagee0
- Treatment
- Application of Sie0
- Outcome
- contents of H2O2, total soluble protein and protein carbonyle0
- Direction
- did not changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of Si did not change the contents of H2O2, total soluble protein and protein carbonyl of drought-stressed plants at booting stage”
t0“wheat”
Claim · model-written summary
Silicon decreased content of H2O2 at filling.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- filling stagee0
- Treatment
- Application of Sie1
- Outcome
- content of H2O2e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas at filling stage, it decreased the content of H2O2 and protein carbonyl and increased the content of total soluble protein”
e1“Application of Si did not change the contents of H2O2”
t0“wheat”
Claim · model-written summary
Silicon decreased protein carbonyl at filling.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- filling stagee0
- Treatment
- Application of Sie1
- Outcome
- protein carbonyle0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas at filling stage, it decreased the content of H2O2 and protein carbonyl and increased the content of total soluble protein”
e1“Application of Si did not change the contents of H2O2”
t0“wheat”
Claim · model-written summary
Silicon increased content of total soluble protein at filling.
- Taxon
- wheatTriticum aestivumt0
- Organ / stage
- filling stagee0
- Treatment
- Application of Sie1
- Outcome
- content of total soluble proteine0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“whereas at filling stage, it decreased the content of H2O2 and protein carbonyl and increased the content of total soluble protein”
e1“Application of Si did not change the contents of H2O2”
t0“wheat”
Claim · model-written summary
Silicon decreased content of thiobarbituric acid reactive substances (TBARS) in drought-stressed plants at both stages.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- application of Sie0
- Outcome
- content of thiobarbituric acid reactive substances (TBARS)e0
- Direction
- decreasede0
- Qualifier
- at both stagese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The content of thiobarbituric acid reactive substances (TBARS) and the activities of acid phospholipase (AP) and lipoxygenase (LOX) in drought-stressed plants were also decreased by application of Si at both stages.”
t0“wheat”
Claim · model-written summary
Silicon decreased activities of acid phospholipase (AP) and lipoxygenase (LOX) in drought-stressed plants at both stages.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- application of Sie0
- Outcome
- activities of acid phospholipase (AP) and lipoxygenase (LOX)e0
- Direction
- decreasede0
- Qualifier
- at both stagese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The content of thiobarbituric acid reactive substances (TBARS) and the activities of acid phospholipase (AP) and lipoxygenase (LOX) in drought-stressed plants were also decreased by application of Si at both stages.”
t0“wheat”
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