Abstract
The present study investigated the effect of paclobutrazol (PBZ) foliar application on oxidative metabolism in salt-stressed rice (Oryza sativa L. cv. ‘Pathumthani 1’; PTT1) seedlings. Fourteen-days-old rice seedlings, grown in the pots were pretreated with 15 mg L-1 paclobutrazol supplied as foliar spray. One week after pretreatment, the rice seedlings were exposed to salt stress (150 mM NaCl) for 12 days. It was observed that salinity enhanced the production of reactive oxygen species (ROS), including superoxide radical (O2•−), hydrogen peroxide (H2O2) and hydroxyl radical (OH·). It also increased reactive oxygen species-associated oxidative damage, measured in terms of lipoxygenase activity, conjugated dienes, malondialdehyde content and relative electrolyte leakage. Increase in these parameters was associated with the decrease in the activity of enzymatic antioxidants [superoxide dismutase (SOD), ascorbate peroxidase (APX) and catalase (CAT)] and the levels of non-enzymatic antioxidants [ascorbic acid (AsA), total glutathione and α-tocopherol contents). Pretreatment of seedlings with paclobutrazol significantly lowered reactive oxygen species accumulation and membrane damage (p < 0.05), which can be correlated with the increased antioxidant activity (both enzymatic and non-enzymatic traits) under salt stress. The study concluded that paclobutrazol-treatment up-regulates the antioxidant defense system and recuperates the salt-induced oxidative damage in ‘Pathumthani 1’ rice seedlings under salt stress.
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Claims 6
Claim · model-written summary
Salinity increased reactive oxygen species production.
- Taxon
- rice
Oryza sativae1 - Material
- Pathumthani 1e1
- Treatment
- salinitye0
- Outcome
- production of reactive oxygen species (ROS)e0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salinity enhanced the production of reactive oxygen species (ROS), including superoxide radical (O2•−), hydrogen peroxide (H2O2) and hydroxyl radical (OH·)”
e1“salt-stressed rice (Oryza sativa L. cv. ‘Pathumthani 1’; PTT1) seedlings”
Claim · model-written summary
Salinity increased oxidative damage indicators.
- Taxon
- riceOryza sativae1
- Outcome
- reactive oxygen species-associated oxidative damagee0
- Direction
- increasede0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“It also increased reactive oxygen species-associated oxidative damage, measured in terms of lipoxygenase activity, conjugated dienes, malondialdehyde content and relative electrolyte leakage.”
e1“salt-stressed rice (Oryza sativa L. cv. ‘Pathumthani 1’; PTT1) seedlings”
Claim · model-written summary
Antioxidant enzyme activities decreased as oxidative damage indicators increased.
- Taxon
- riceOryza sativae2
- Treatment
- salt-stressede2
- Outcome
- activity of enzymatic antioxidantse0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“decrease in the activity of enzymatic antioxidants [superoxide dismutase (SOD), ascorbate peroxidase (APX) and catalase (CAT)]”
e1“Increase in these parameters was associated with the decrease”
e2“salt-stressed rice”
Claim · model-written summary
Nonenzymatic antioxidant levels decreased as oxidative damage indicators increased.
- Taxon
- riceOryza sativae2
- Treatment
- salt-stressede2
- Outcome
- levels of non-enzymatic antioxidantse0
- Direction
- decreasee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the levels of non-enzymatic antioxidants [ascorbic acid (AsA), total glutathione and α-tocopherol contents)”
e1“Increase in these parameters was associated with the decrease”
e2“salt-stressed rice”
Claim · model-written summary
Paclobutrazol pretreatment significantly lowered reactive oxygen species accumulation and membrane damage under salt stress.
- Taxon
- riceOryza sativae1
- Treatment
- paclobutrazole0
- Outcome
- reactive oxygen species accumulation and membrane damagee0
- Direction
- lowerede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pretreatment of seedlings with paclobutrazol significantly lowered reactive oxygen species accumulation and membrane damage (p < 0.05)”
e1“The present study investigated the effect of paclobutrazol (PBZ) foliar application on oxidative metabolism in salt-stressed rice”
Claim · model-written summary
Paclobutrazol pretreatment was associated with increased enzymatic and nonenzymatic antioxidant activity under salt stress.
- Taxon
- riceOryza sativae2
- Treatment
- paclobutrazole1
- Outcome
- antioxidant activitye0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased antioxidant activity (both enzymatic and non-enzymatic traits) under salt stress”
e1“Pretreatment of seedlings with paclobutrazol”
e2“Fourteen-days-old rice seedlings”
The same questions in other papers
paclobutrazol · physiology: oxidative · Oryza sativa (rice)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →salinity · physiology: oxidative · Oryza sativa (rice)Results differ
58 papers in the same direction as this paper · 7 in the opposite direction
- negative
- positive
- positive
62 papers more in this group
See all 66 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.