Abstract
Superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX) are antioxidant enzymes which have important role in the metabolic reactive oxygen species (ROS) and defence against oxidative stress damage. Antioxidant enzymes activity increases in plant cells as a response to environmental stresses. The objective of this study was to evaluate the effects of micronutrients application on the antioxidant enzyme metabolism (SOD, CAT and GPX) in sunflower under drought stress. This experiment was carried out at Golmakan Agriculture Research Station (Iran) in 2005, using a split plot randomized complete block design with four replications. Irrigation as a main factor at three levels (normal, low stress and high stress) and six micronutrient treatments (control, Fe, Fe+Zn, Fe+Zn+Cu, Fe+Zn+Cu+Mn, Fe+Zn+Cu+Mn+B) as sub-plots within the main plots. Base fertilizers (N,P,K) and micronutrient treatments also used as required on the basis of the soil test. Results showed that the activity of these enzymes was significantly different (a= 5%) between control and stress treatments. The antioxidant enzymes concentrations were increased at 11-31% under high stress. Also there were significant differences (a= 5%) between control and micronutrient treatments under different enzyme concentrations. The antioxidant enzymes concentrations were increased at 48-89% level with Fe+Zn+ Cu+Mn treatment. The results showed that under drought stress micronutrients application increase drought resistance in sunflower.
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Claims 5
Claim · model-written summary
Antioxidant enzyme activity differed significantly between control and drought stress treatments.
- Taxon
- sunflower (Helianthus annuus L.)
Helianthus annuust0 - Treatment
- stress treatmentse0
- Outcome
- activity of these enzymese0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Results showed that the activity of these enzymes was significantly different (a= 5%) between control and stress treatments”
t0“sunflower (Helianthus annuus L.)”
Claim · model-written summary
High drought stress increased antioxidant enzyme concentrations by 11-31%.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuust0
- Treatment
- high stresse0
- Outcome
- antioxidant enzymes concentrationse0
- Direction
- increasede0
- Value
- 11-31%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The antioxidant enzymes concentrations were increased at 11-31% under high stress”
t0“sunflower (Helianthus annuus L.)”
Claim · model-written summary
Antioxidant enzyme concentrations differed significantly between control and micronutrient treatments.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuust0
- Treatment
- micronutrient treatmentse0
- Outcome
- enzyme concentrationse0
- Comparator
- controle0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there were significant differences (a= 5%) between control and micronutrient treatments under different enzyme concentrations”
t0“sunflower (Helianthus annuus L.)”
Claim · model-written summary
Fe+Zn+ Cu+Mn treatment increased antioxidant enzyme concentrations by 48-89%.
- Taxon
- sunflower (Helianthus annuus L.)Helianthus annuust0
- Treatment
- Fe+Zn+ Cu+Mn treatmente0
- Outcome
- antioxidant enzymes concentrationse0
- Direction
- increasede0
- Value
- 48-89%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The antioxidant enzymes concentrations were increased at 48-89% level with Fe+Zn+ Cu+Mn treatment”
t0“sunflower (Helianthus annuus L.)”
Claim · model-written summary
The authors conclude micronutrient application increases sunflower drought resistance under drought stress.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- micronutrients applicatione0
- Outcome
- drought resistancee0
- Direction
- increasee0
- Qualifier
- under drought stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“under drought stress micronutrients application increase drought resistance in sunflower”
The same questions in other papers
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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.